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Best Telescope Diagonals - Buying Guide

Last Updated: 07/17/2019

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Bestselling Telescope Diagonals on Amazon

  1. Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope)
  2. Baader Planetarium 2-Inch Clicklock Mirror Diagonal Eyepiece
  3. Orion 8727 2-Inch Dielectric Mirror Star Diagonal
  4. Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal
  5. Astromania 1.25" 90-Degree Erecting Prism Optical Prism Inside Rather Than a Mirror which Makes Your...
  6. SVBONY 1.25 inches 45 Degree Erecting Image Diagonal Zenith Mirror for Refractor Catadioptric Telesc...
  7. SVBONY 1.25 inches 90 Degree Zenith Diagonal Mirror for Refractor and Cassegrain Telescopes Astronom...
  8. 1.25" 90-Degree Erect Image Prism Diagonal for Telescope, 31.7mm Optical Prism Inside Rather Than a ...
  9. Astromania 1.25" 90-Degree Diagonal Mirror - More Comfortable Viewing Orientation as You Observe fro...
  10. Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal

  #1

Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope)

Model: 93527   |    Mpn: 93527   |    Ean: 0050234935272   |    PartNumber: 93527   |   Asin: B000F8SZIG

There are few telescope accessories that work as hard or matter as much as a diagonal! An integral part of the optical chain, a good diagonal can make a big difference in the quality of the image you see. A 2 diagonal is required if you want to use 2 eyepieces when observing with your telescope. The larger 2 barrel allows you to see a bigger percentage of the telescope s light cone, which works wonders for capturing faint deep sky objects with low surface brightness. The Celestron 2 Mirror Diagonal was built for superior performance. The housing is machined with precision instruments to make sure the optics stay perfectly aligned. The diagonal s mirror is tested with an interferometer, and is guaranteed to be 1/10 wave or better. The mirror s surface is covered with the same high performance XLT coatings used on Celestron s best telescopes, and the result is a sharp, bright image that will satisfy the most discriminating amateur astronomer. This 2 diagonal threads securely to the rear cell of standard Schmidt-Cassegrain telescopes. To take advantage of the XLT Diagonal s extra light throughput, insert a 2 eyepiece into the barrel. If you want to use 1.25 eyepieces, slide the included 2 to 1.25 adapter into the eyepiece barrel and secure it with the thumbscrew. When you re not observing, store your diagonal in the included aluminum case for protection.

Features

  • 2" SCT mirror diagonal with high performance XLT coatings
  • 1/10th wave mirror is tested with an interferometer to ensure quality
  • Housing is precision machined to achieve and hold good optical alignment.
  • Includes a 2 to 1.25 adapter and aluminum carry case
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Brand: Celestron   |   Manufacturer: Celestron

Item Dimensions: 8 x 8 x 7 inches (20.3 x 20.3 x 17.8 cm)   |   Package Dimensions: 7.01 x 7.4 x 8.19 inches (17.8 x 18.8 x 20.8 cm)

Amazon Price: $120.00 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $121.00 | Used Price: $92.21

Warranty: 2 Year accessories warranty

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  #2

Baader Planetarium 2-Inch Clicklock Mirror Diagonal Eyepiece

Model: 2956100   |    Mpn: 2956100   |    Ean: 0962392002201   |    PartNumber: 2956100   |   Asin: B002SYBF8M

High quality, beautifully crafted star diagonal.The highly accurate mirror is not hindered by its ultra reflective coatings as many similar models are, in some models up to 1/2 a wave accuracy is lost due to the layers of coatings, this is not the case with Baaders all-dielectric mirror coatings.Your eyepieces are protected from marks and scratches by Baaders innovative clicklock clamp system, a simple 20 degree twist is all it takes to secure your eyepieces. Oversized 2" dielectric 1/10 wave mirror Scratch resistant hard coated mirror surface for safe cleaning, to remain scratch free even if subjected to harsh environment Mirror rejects deep UV and IR radiation safe for solar viewing with all White-Light and H-Alpha Solar Filters Largest possible clear aperture for widefield application Smooth outer shape without sharp corners Baader ClickLock 2" Clamp for ultrafast clamping action Clamps heavy accessories effortless, with fingertip action 2" nosepiece with large clear aperture, removeable

Features

  • Oversized 2" dielectric 1/10 wave mirror
  • Scratch resistant hard coated mirror surface for safe cleaning, to remain scratch free even if subjected to harsh environment
  • Mirror rejects deep UV and IR radiation safe for solar viewing with all White-Light and H-Alpha Solar Filters
  • Largest possible clear aperture for widefield application
  • Clamps heavy accessories effortless, with fingertip action
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Brand: Baader-Planetarium   |   Manufacturer: Baader Planetarium

Item Dimensions: 4.13 x 4.33 x 6.5 inches (10.5 x 11.0 x 16.5 cm)   |   Package Dimensions: 4.09 x 4.33 x 6.54 inches (10.4 x 11.0 x 16.6 cm)

Amazon Price: $228.75 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $228.80

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  #3

Orion 8727 2-Inch Dielectric Mirror Star Diagonal

Model: 8727   |    Mpn: 8727   |    Ean: 0759270087272   |    PartNumber: 8727   |   Asin: B000FA73UA

The Orion 2" Dielectric Mirror Star Diagonal is an ideal choice for refractor and Cassegrain telescopes equipped with a big, 2" focuser. This diagonal is perfect for those who wish to obtain the brightest views possible while using a diagonal. The high-quality mirror diagonal features sophisticated, lab-tested dielectric coatings that boast an astounding 99% reflectivity. With such a high reflectivity diagonal, your telescopic views of starry skies will be bright, detailed and full of contrast. Dielectric mirror coatings are more durable than enhanced aluminum coatings, so you'll enjoy year after year of exceptional performance without degradation. The machined and anodized aluminum diagonal housing features machine-threaded internal baffles to ensure high-contrast performance. This 2" diagonal has a 1.25" adapter, so it can be used with both 2" and 1.25" telescope eyepieces. A non-marring compression collar is built-in to both the 2" holder and 1.25" adapter to safely secure any inserted telescope eyepiece without scratching. The diagonal's 2" nosepiece barrel is conveniently threaded to accept like-sized filters. Protective caps are included to keep the diagonal free of dust when not in use. Diagonals are not recommended for use with Newtonian reflector telescopes.

Features

  • 90 degrees 2" mirror diagonal features sophisticated, lab-tested dielectric coatings that provide an astounding 99% reflectivity
  • Dielectric mirror coatings are more durable than enhanced aluminum coatings and provide higher reflectivity for maximum view brightness
  • Machined and anodized aluminum housing features machine-threaded glare baffles for high contrast
  • Nosepiece barrel is threaded to accept 2 Orion filters, a 2-1.25 step-down adapter is included
  • The diagonal is a great way to make nighttime viewing orientations through a refractor telescope more comfortable
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Brand: Orion   |   Manufacturer: Orion

Package Dimensions: 4.6 x 5.1 x 7.8 inches (11.7 x 13.0 x 19.8 cm)

Amazon Price: $116.99 | as of 07/17/2019(10:49pm pst)
Availibility:
List Price: $118.08

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  #4

Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal

Model: 40901   |    Mpn: 40901   |    Ean: 0759270409012   |    PartNumber: 40901   |   Asin: B01LWJM739

The Orion 1.25 inch Twist-Tight Dielectric Mirror Star Diagonal gives the typical thumbscrew-equipped telescope diagonal a new twist - literally! This innovative diagonal features a twist-tight clamping mechanism that securely grasps inserted 1.25 inch eyepieces and accessories with a simple clockwise twist of its red aluminum collar.

Unlike thumbscrew-equipped diagonals, the Orion Twist-Tight diagonal delivers equal inward pressure to precisely center eyepieces, camera nosepieces, and other equipment along the light path of the telescope with a more robust grip. What's more, since this diagonal doesn't use a thumbscrew, you don't have to worry about annoying scratches or gouges appearing on your treasured eyepieces, and there's no thumbscrew to lose in the dark! The easy-grip, knurled aluminum twist-tight collar is delightfully easy to adjust, even while wearing gloves during cold nights.

The Orion 1.25 inch Dielectric Twist-Tight Mirror Star Diagonal is built around a highly reflective mirror with sophisticated, lab-tested dielectric coatings providing 99% reflectivity. With such high reflectivity, this diagonal will help you obtain the brightest views possible through a refractor or Cassegrain telescope. The 1.25 inch Twist-Tight Diagonal's rugged anodized aluminum housing features machine-threaded internal baffles to ensure optimal contrast and also eliminate pesky internal reflections and glare. What's more, since dielectric coatings are more durable than enhanced aluminum coatings, you'll enjoy year after year of exceptional performance without degradation.

The diagonal's 1.25 inch nosepiece barrel is conveniently threaded to accept like-sized filters so you can easily swap between different telescope eyepieces and other accessories without the hassle of re-attaching the filter each time. Protective caps are included to keep the diagonal free of dust when not in use.

Please note: diagonals are not recommended for use with Newtonian reflector telescopes.

Features

  • 1.25", 90-degree mirror diagonal features sophisticated dielectric coatings with highly efficient 99% reflectivity for peak performance
  • Twist-tight clamping mechanism grips inserted eyepieces more securely than typical thumbscrew-equipped diagonals - without scratching!
  • Durable dielectric mirror coatings provide higher reflectivity for maximum brightness and contrast
  • Machined and anodized aluminum housing features machine-threaded glare baffles to eliminate glare for great performance
  • Nosepiece barrel threaded to accept 1.25 Orion filters
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Brand: Orion   |   Manufacturer: Orion

Item Dimensions: 3 x 1.75 x 4.5 inches (7.6 x 4.4 x 11.4 cm)   |   Package Dimensions: 3.62 x 4.25 x 5.12 inches (9.2 x 10.8 x 13.0 cm)

First Available: 2018-12-12

Amazon Price: $107.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $119.99

Warranty: Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.

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  #5

Astromania 1.25" 90-Degree Erecting Prism Optical Prism Inside Rather Than a Mirror which Makes Your Image Clear and Sharp

Model: SKU_AM_EP1D90   |    Mpn: SKU_AM_EP1D90   |    Ean: 6970019291093   |    PartNumber: SKU_AM_EP1D90   |   Asin: B0140U9XXK

Astromania 1.25" 90-degree Erecting Prism. This is an economical 1.25" 90-deg prism diagonal for astronomical telescopes and spotting scopes. With this 90-degree erecting prism transform your telescope into a telescope for nature observation. This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.The prism is made of genuine optically processed BK7 glass, high quality optical prism inside rather than a mirror which makes your image clear and sharp. The Amici prism looks as beautiful as binoculars, but you can zoom in much higher with your eyepieces.Simply insert the erecting prism into the 1.25 "focuser and enjoy upright and right-angled images with your eyepieces - watch birds, deer at the edge of the forest, the summit cross on a mountain or a cruise ship far out on the sea. Please Note: This diagonal can only be used with refractor telescopes and some catadioptric telescopes like Schmidt-Cassegrain, Maksutov-Cassegrain, etc. Not intended for use with reflector telescopes like Newtonian / Dobsonian reflector telescopes or other variants of Newtonian telescopes.

Features

  • Typically, you see the picture standing upside down. But what if you also want to observe nature? With this 90-degree erecting prism transform your telescope into a telescope for nature observation with upright and left-right corrected image. This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.
  • Comfortable observation with 90-degree: Look pleasantly from above into your eyepiece, filter thread for any 1.25 filter and accepts standard 1.25 eyepieces.
  • The Amici prism gives you a bright and clear picture: The prism is made of genuine optically processed BK7 glass, high quality optical prism inside rather than a mirror which makes your image clear and sharp. The Amici prism looks as beautiful as binoculars, but you can zoom in much higher with your eyepieces.
  • Simply insert the erecting prism into the 1.25 focuser and enjoy upright and right-angled images with your eyepieces - watch birds, deer at the edge of the forest, the summit cross on a mountain or a cruise ship far out on the sea.
  • The prism housing is made of precision molded ABS plastic and the two sleeves are made of metal - which ensures a tight fit and long grip. Use a clamping screw made of aluminum to fix your eyepiece. So you can even look sideways through your telescope - the eyepiece does not sit and fall out. From now on nature lies at your feet: even if it is far away.
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Brand: Astromania   |   Manufacturer: Astromania

Item Dimensions: 2.11 x 2.8 x 4.42 inches (5.4 x 7.1 x 11.2 cm)   |   Package Dimensions: 2.3 x 2.6 x 4.5 inches (5.8 x 6.6 x 11.4 cm)

Amazon Price: $32.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $32.99

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  #6

SVBONY 1.25 inches 45 Degree Erecting Image Diagonal Zenith Mirror for Refractor Catadioptric Telescope and Astronomical Telescope Eyepiece

Model: FUSW2560A   |    Mpn: FUSW2560A   |    Ean: 0714559073797   |    PartNumber: FUSW2560A   |   Asin: B071CKG619

SVBONY 45 degree erecting image diagonal prism for telescope and any standard 1.25" eyepiece

It's easily correct upside down and left right reversed image;makes it easier to navigate the day and night skies with telescope in correct position

You can insert it into the 1.25 " telescope silver terminal;the other end with a screw fixed 1.25" eyepiece;it can also be used to observe astronomy;nebula;cluster;nebula scattered with high brightness and excellent optical properties

Main Features:
Semi-metallic material;45 degrees
High optical lens transparency provides clear and sharp images
Standard 1.25 "diameter fits for 1.25" eyepiece and telescope
The dust cover keeps the lens clean to extend the service life
Type: zenith mirror
Observation angle: 45 degrees
Color black and silver
Net weight: 75.50g
Gross weight 96.90g
Material:metal and plastic
Package includes:
1 x 1.25" 45 degree zenith mirror

Lifetime warranty;we confidently promise lifetime warranty for each one from us

Features

  • High-quality prism diagonal provides a comfortable and sharp 45 degree viewing orientation for great daytime terrestrial views and night time astronomy applications for telescopes or spotting scopes
  • High optical lens transparency;the large quality prism allows more light transmission;so that delievers a clear image
  • Standard 1.25 diameter for filter thread for any 1.25 filter;fits for the standard 1.25 telescope eyepiece
  • Semi-metallic zenith mirror has dust cover keeping the lens clean,so that provides clear and sharp images and extends the service life
  • Lifetime warranty;we confidently promise lifetime warranty for each one from us
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Brand: SVBONY   |   Manufacturer: SVBONY

Item Dimensions: 2.9 x 2.14 x 4.29 inches (7.4 x 5.4 x 10.9 cm)   |   Package Dimensions: 2.36 x 4.65 x 6.93 inches (6.0 x 11.8 x 17.6 cm)

Amazon Price: $19.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $19.99

Warranty: Lifetime warranty;we confidently promise lifetime warranty for each one form us

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  #7

SVBONY 1.25 inches 90 Degree Zenith Diagonal Mirror for Refractor and Cassegrain Telescopes Astronomical Telescope

Model: FUSW2239A   |    Mpn: FUSW2239A   |    Ean: 0635266470177   |    PartNumber: FUSW2239A   |   Asin: B00Y0NDOQK

If you are tired of trying to invert things in your mind and staring at upside down stuff;this SVBONY 90-Deg Zenith Mirror could turn your refracting telescope into a scope

It can be used to observe objects on earth with comfortable angle image;it's convenient to look at the zenith of the sky and close to horizontal observation

Main points:

1.25" 90 degree angle mirror:
Using with refractor telescope;the image is upright;though left and right reversed;not affect viewing celestial bodies

Standard 1.25" diameter:
Fit for 1.25" telescope eyepiece and telescope focuser

Designed for:
Work with refractor and catadioptric telescopes;not recommended for reflector telescope

Wide 90 degree refraction angle:
View correct image from refractor telescope stand and just look down with a comfortable angle

Super easy to use:
Just insert into 1.25" telescope at the silver end;the other end fix 1.25" eyepiece by the screw

Body material:
Plastic and metal;fully optical glass lens;provide clear and sharp image

With dust cover:
Always keep your lens clear;prolong the 90 degree zenith mirror using life

Weight:
109g;3.85oz;convenient to carry anywhere where you wanted to go

Package include:
1x90degree zenith mirror for 1.25" eyepiece

The zenith mirror is suitable for refraction and the Cassegrain telescope;not recommended for the reflector

Features

  • Standard 1.25'' diameter;fit for 1.25'' focuser and eyepiece;work with refractor and catadioptric telescopes;not recommended for reflector telescope
  • Coated lens come with dust cover;keep your lens clean for superior image fidelity
  • Wide 90 degree angle;you can view correct image from refractor telescope stand and just look down with a comfortable angle
  • 1.25 90 degree diagonal mirror using with refrator telescope and makes the image upright;though left and right reversed;not affect astronomical observation
  • Lifetime warranty;we confidently promise lifetime warranty for each one from us
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Brand: SVBONY   |   Manufacturer: SVBONY

Item Dimensions: 2.73 x 2.15 x 4.29 inches (6.9 x 5.5 x 10.9 cm)   |   Package Dimensions: 1.9 x 4.7 x 6.7 inches (4.8 x 11.9 x 17.0 cm)

Amazon Price: $18.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $18.99

Warranty: Lifetime warranty;we confidently promise lifetime warranty for each one form us

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  #8

1.25" 90-Degree Erect Image Prism Diagonal for Telescope, 31.7mm Optical Prism Inside Rather Than a Mirror

Model: DMC90   |    Mpn: DMC90   |    Ean: 0711102632494   |    PartNumber: DMC90   |   Asin: B07PYQWB1G

If you are tired of trying to invert things in your mind and staring at upside down stuff; this GazerOptics 90 Degree Diagonal Prism could turn your refracting telescope into a scope.

High Quality

The prism is made of genuine optically processed BAK7 glass, high quality optical 31.7mm prism inside rather than a mirror which makes your image bright and true.

Comfortable Observation

It can be used to observe objects with comfortable angle; it's convenient to look at the zenith of the sky and close to horizontal observation. It produces an image that is oriented properly, which means the image is upright and correct from left to right.

Wide Range of Uses

This is a great diagonal for daytime terrestrial use with small telescopes or spotting scopes. It can also be used for astronomy applications, especially when you would like to match the orientation of the star field with star maps and charts.

Reliable Guarantee

We provide 30-Days no reason return and 12-Month warranty.

P.S: Our product is produced to provide years of enjoyment for you. If you have any question about the product and service, please feel free to contact us. We will do our best to solve your problem.







Features

  • High quality 31.7mm optical prism inside rather than a mirror.
  • 99% Reflectivity across visible spectrum and genuine optically processed BAK7 glass for bright and true images.
  • More comfortable viewing orientation, produce an upright and correct image from left to right.
  • Filter thread for any 1.25 filter, accept any standard 1.25 eyepieces. Work with refractor and catadioptric telescopes, not recommended for reflector telescope.
  • This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.
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Brand: GazerOptics   |   Manufacturer: GazerOptics

Item Dimensions: 2.95 x 1.77 x 2.79 inches (7.5 x 4.5 x 7.1 cm)   |   Package Dimensions: 2.05 x 2.99 x 3.15 inches (5.2 x 7.6 x 8.0 cm)

Amazon Price: $19.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $19.99

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  #9

Astromania 1.25" 90-Degree Diagonal Mirror - More Comfortable Viewing Orientation as You Observe from Above, Filter Thread for Any 1.25" Filter and Accepts Standard 1.25" eyepieces

Model: SKU_AM_DM1D90   |    Mpn: SKU_AM_DM1D90   |    Ean: 6970019291086   |    PartNumber: SKU_AM_DM1D90   |   Asin: B0140U9W3G

Whether it's the Moon, Jupiter or a beautiful nebula - in order to enjoy observing at the telescope you should always be comfortable. In many telescopes, that is only possible by using a star diagonal - which directs the image upwards by 90.This Astromania star diagonal has a 1.25" metal barrel. The chrome finish not only looks good, but is also practical, as the star diagonal always remains firmly attached to the focuser. The clamping screws lock the barrel firmly in place without scoring the nosepiece, as is the case with many cheaper products. In short - this barrel will keep your star diagonal in condition for virtually forever.The mirror has had everything that is possible optimised, within this price range, to ensure you enjoy a bright image - even at higher magnifications. It is the link between your eye and the telescope - and is hence just as important.Sometimes you do not want to have to re-install a filter every time you use a new eyepiece. Perhaps you might want to observe the Moon today with a range of eyepieces - but with the same filter? That is also possible due to the filter thread provided in the star diagonal.

Features

  • 1.25" 90-degree mirror star diagonal for any telescope with 1.25" connector (not suitable for Newtonians).
  • More comfortable viewing orientation as you observe from above, filter thread for any 1.25 filter. Accepts standard 1.25 eyepieces.
  • Protective coating on the mirror to ensure a long life, metal barrel - for secure seating in the focuser.
  • Useful for refractor and Cassegrain telescopes - not recommended for reflectors.
  • Wide 90 degree angle: You can view correct image from refractor telescope stand and just look down with a comfortable angle.
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Brand: Astromania   |   Manufacturer: Astromania

Item Dimensions: 2.11 x 2.8 x 4.42 inches (5.4 x 7.1 x 11.2 cm)   |   Package Dimensions: 2 x 3 x 4 inches (5.1 x 7.6 x 10.2 cm)

Amazon Price: $21.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $21.99

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  #10

Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal

Model: 8880   |    Mpn: 8880   |    Ean: 0759270088804   |    PartNumber: 8880   |   Asin: B000FA8U9S

The Orion 1.25" Dielectric Mirror Star Diagonal is an ideal choice for refractor and Cassegrain telescope owners who wish to obtain the brightest views possible while using a diagonal. This high-quality mirror diagonal features sophisticated, lab-tested dielectric coatings that boast an astounding 99% reflectivity. With such a high reflectivity diagonal, your telescopic views of starry skies will be bright, detailed and full of contrast. Dielectric mirror coatings are more durable than enhanced aluminum coatings, so you'll enjoy year after year of exceptional performance without degradation. The machined and anodized aluminum diagonal housing features machine-threaded internal baffles to ensure high-contrast performance. A non-marring compression collar is built-in to safely secure any inserted 1.25" telescope eyepiece without scratching. The diagonal's 1.25" nosepiece barrel is conveniently threaded to accept like-sized filters. Protective caps are included to keep the diagonal free of dust when not in use. Diagonals are not recommended for use with Newtonian reflector telescopes.

Features

  • 90 diagonal features sophisticated, lab-tested dielectric coatings that boast an astounding 99 percent reflectivity
  • Dielectric mirror coatings are more durable and more reflective than enhanced aluminum coatings
  • Diagonal provides a comfortable 90-degree viewing orientation when observing the night sky through a refractor, Maksutov-Cassegrain (Mak-Cass) or Schmidt-Cassegrain telescope
  • Machined and anodized aluminum housing features machine-threaded baffles for optimized contrast
  • 1.25 nosepiece barrel is threaded to accept like-sized Orion eyepiece filters
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Brand: Orion   |   Manufacturer: Orion

Package Dimensions: 3.7 x 4.2 x 5.2 inches (9.4 x 10.7 x 13.2 cm)

Amazon Price: $89.99 | as of 07/17/2019(10:49pm pst)
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List Price: $97.70

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  #11

Orion 8879 1.25-Inch Enhanced Mirror Star Telescope Diagonal

Model: 8879   |    Mpn: 8879   |    Ean: 0759270088798   |    PartNumber: 8879   |   Asin: B000BMPBLK

Don't put a standard-issue diagonal into a high-quality refractor or Cassegrain telescope or you'll be losing 10% or more of the light collected by the scope's optics. Use an Orion Enhanced diagonal instead. Their lab-tested enhanced aluminum coatings reflect 97% of the inbound light to your eyepiece, for brighter images compared to standard diagonals. Beautifully machined and anodized aluminum housings feature machine-threaded baffles for high contrast and nonmarring compression ring collars for securing the eyepiece. Nosepiece barrels are threaded to accept filters. Endcaps included.

Features

  • The precision flat mirror in this 90 degrees diagonal is meticulously polished to yield excellent performance
  • Anodized aluminum housings are internally blackened for high contrast views free of glare
  • Fits 1.25 telescope focusers, accepts 1.25 eyepieces
  • Enhanced Aluminum mirror coatings yield 97% reflectivity for bright clear views
  • Includes dustcaps for storage
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Brand: Orion   |   Manufacturer: Orion

Package Dimensions: 3.6 x 4.3 x 5.2 inches (9.1 x 10.9 x 13.2 cm)

Amazon Price: $71.99 | as of 07/17/2019(10:49pm pst)
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List Price: $76.68

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  #12

SVBONY 1.25 inches 90 Degree Zenith Mirror Diagonal Adapter Erect Image Fully Metal for Refracting Telescope Eyepiece Lens

Model: FUSF9171A   |    Mpn: FUSF9171A   |    Ean: 0794604981253   |    PartNumber: FUSF9171A   |   Asin: B07GPMX7BN

The Svbony fully metal 1.25" Mirrors Diagonal zenith mirror offers an upright figure which is but turned backward in left and right position. It is suitable in particular for astronomical observations. The mirror depicts clean and full of contrasts. The mirror is suitable for refractors, Celestron EQ, Meade Infinity and similar telescopes. It is not suitable due to the length reflectors for Newton. Specifications:
Connection eyepiece: 1.25"
Connecting telescopic: 1.25" & 2" (2" need adapter)
Clamp: 1 screw
Reflectivity: 90%
Housing material: Metal
Suitable for: Refractors
Net Weight: 142g / 5.0oz Not suitable for: Newtonians Package Includes:
Fully Metal 1.25" Mirrors Diagonal 90-Degree
1.25" Dust Cover

Features

  • Standard 1.25'' diameter; fit for 1.25'' eyepiece and telescope focuser;Note;not suitable for Newtonians
  • Work with refractor and catadioptric telescopes;not for reflector telescope
  • Wide 90 degree angle;you can view correct image from refractor telescope stand and just look down with a comfortable angle
  • Super easy to use;just insert into 1.25'' telescope at the silver end;the other end fix 1.25'' eyepiece by the screw
  • Body material is full metal;optical glass lens provide clear and sharp image With dust cover always keep your lens clear prolong life
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Brand: SVBONY   |   Manufacturer: SVBONY

Item Dimensions: 2.17 x 3.35 x 5.51 inches (5.5 x 8.5 x 14.0 cm)   |   Package Dimensions: 0.7 x 2.7 x 6.9 inches (1.8 x 6.9 x 17.5 cm)

Amazon Price: $31.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $31.99

Warranty: Lifetime warranty;we confidently promise lifetime warranty for each one form us

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  #13

SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter

 PartNumber: FW2733A   |   Asin: B07QXW921T

If you paid for high performance coatings for your telescope, why lose 8% of your light using a standard diagonal We list our dielectric coated diagonals at 99% reflectance, but this does not tell the complete story.
While the reflectance is at a little more than 99% for the deep violet and reds, the reflectance for a the rest of the spectrum is essentially 100% Features:
100% Brand New and Never Used
High glossy finish appearance
Threads fit standard 1.25'' and 2'' filters
Excellent Quality Dielectric Diagonal
Provides a Comfortable 90 Degree View from your Refractor
Fits Standard 2" (50.8 mm) Diameter Focus Tubes
Can Use Both 50.8 mm and 31.75 mm Eyepieces
Has a non-marring brass compression ring to secure your valuable eyepieces
Material: Metal
Color: Black
Net Weight: 529g/18.67oz Package Includes:
1 x 2" 90-deg Dielectric Mirror Diagonal
1 x 1.25" Dust Cover
1 x 2" Dust Cover

Features

  • Excellent Quality Dielectric Diagonal; Mirror Star Diagonal - 99% Reflectivity Provides a Comfortable 90 Degree View from your Refractor; Fits Standard 2" (50.8 mm) Diameter Focus Tubes; Use Both 2" (50.8 mm) and 1.25" (31.75 mm) Eyepieces
  • New 2 90 deg 99% Dielectric Mirror Diagonal for Telescope With 1.25 adapter; full metal;has a 1/10th wave flat optical glass surface;solid aluminum housing;threaded to accept standard 2 filters;The 2 eyepiece holder uses a non-marring brass compression ring to secure your valuable eyepieces. The 1.25 adapter also has a non-marring brass compression ring
  • Both sizes of eyepieces may be used and are protected from dings and scratches that would result from a standard set-screw. This 2 diagonal works with any Refractor that accepts a 2 star diagonals. It can also be used with Schmidt-Cassegrain or Maksutov-Cassegrain with an optional 2 inch visual back (See below)
  • Dielectric diagonal is especially important;A standard aluminized diagonal has about 92% reflectance;And this decreases with time as the aluminum mirror surface ages
  • For the vast majority of the visible spectrum;the reflectance does not vary more than about 0.1% below 100%;And the dielectric surface does not age like aluminum;This combination leads to the equivalent of a little more light grasp compared to standard diagonals
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Brand: SVBONY   |   Manufacturer: SVBONY

Item Dimensions: 3.54 x 3.94 x 5.91 inches (9.0 x 10.0 x 15.0 cm)   |   Package Dimensions: 1 x 1 x 2 inches (2.5 x 2.5 x 5.1 cm)

Amazon Price: $62.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $62.99

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  #14

Astromania 1.25" 45-Degree Diagonal Prism Optical Prism Inside Rather Than a Mirror which Makes Your Image Clear and Sharp

Model: SKU_AM_DP1D45   |    Mpn: SKU_AM_DP1D45   |    Ean: 6970019291079   |    PartNumber: SKU_AM_DP1D45   |   Asin: B0140U9U1A

Whether it's the Moon, Jupiter or a beautiful nebula - in order to enjoy observing at the telescope you should always be comfortable. In many telescopes, that is only possible by using a star diagonal - which directs the image upwards by 45.This Astromania star diagonal has a 1.25" metal barrel. The chrome finish not only looks good, but is also practical, as the star diagonal always remains firmly attached to the focuser. The clamping screws lock the barrel firmly in place without scoring the nosepiece, as is the case with many cheaper products. In short - this barrel will keep your star diagonal in condition for virtually forever.The mirror has had everything that is possible optimised, within this price range, to ensure you enjoy a bright image - even at higher magnifications. It is the link between your eye and the telescope - and is hence just as important.Sometimes you do not want to have to re-install a filter every time you use a new eyepiece. Perhaps you might want to observe the Moon today with a range of eyepieces - but with the same filter? That is also possible due to the filter thread provided in the star diagonal.

Features

  • High quality optical Prism inside rather than a mirror which makes your image clear and sharp.
  • More comfortable viewing orientation as you observe from above, filter thread for any 1.25 filter. Accepts standard 1.25 eyepieces.
  • Protective coating on the mirror to ensure a long life, metal barrel - for secure seating in the focuser.
  • This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.
  • 1.25 45-degree mirror star diagonal for refractor telescopes with 1.25 connector (not recommended for reflectors).
  • See more on Amazon...

Brand: Astromania   |   Manufacturer: Astromania

Item Dimensions: 2.11 x 2.8 x 4.42 inches (5.4 x 7.1 x 11.2 cm)   |   Package Dimensions: 2 x 3 x 4 inches (5.1 x 7.6 x 10.2 cm)

Amazon Price: $27.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $27.99

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  #15

Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal

Model: 40902   |    Mpn: 40902   |    Ean: 0759270409029   |    PartNumber: 40902   |   Asin: B01LWVB3YQ

Orion has given their 2 inch dielectric mirror diagonal a new twist - literally! With its twist-tight clamping mechanism, the Orion 2 inch Dielectric Twist-Tight Mirror Star Diagonal presents a significant upgrade from typical thumbscrew-equipped diagonals. A simple clockwise twist of the diagonal's knurled red aluminum collar precisely centers any inserted eyepiece or accessory and holds it securely in place.

The innovative twist-tight mechanism keeps your valuable eyepieces free of pesky thumbscrew scratches, and also provides a more secure grip than thumbscrew-equipped diagonals. You'll especially appreciate the Orion 2 inch Dielectric Twist-Tight Mirror Star Diagonal when using a telescope during clear, cold evenings thanks to how easy it is to tighten and loosen the large, knurled collar - even while wearing bulky gloves!

Built around a highly reflective mirror featuring lab-tested dielectric coatings that provide an astounding 99% reflectivity, the Orion 2 inch Dielectric Twist-Tight Mirror Star Diagonal will help you obtain the brightest views possible through a refractor or Cassegrain telescope equipped with a big, 2 inch focuser. Plus, since dielectric coatings are more durable than enhanced aluminum coatings, you'll enjoy year after year of exceptional performance without degradation. To further optimize contrast and brightness, the diagonal's anodized aluminum housing features machine-threaded internal baffles to eliminate pesky internal reflections and glare.

The versatile Orion 2 inch Dielectric Twist-Tight Mirror Star Diagonal includes a handy 1.25 inch adapter, so it can be used with both 2 inch and 1.25 inch telescope eyepieces. Both the 2 inch holder and 1.25 inch step-down adapter feature a twist-tight collar. Protective caps are included to keep the diagonal free of dust when not in use.

Please note: diagonals are not recommended for use with Newtonian reflector telescopes

Features

  • This 2", 90-degree mirror diagonal features sophisticated dielectric coatings with highly efficient 99% reflectivity
  • Twist-tight clamping mechanism grips inserted eyepieces more securely than typical thumbscrew-equipped diagonals - without scratches!
  • Dielectric mirror coatings provide higher reflectivity for maximum brightness and contrast with more durability than enhanced aluminum coatings
  • Machined and anodized aluminum housing features machine-threaded glare baffles for peak performance
  • Nosepiece barrel is threaded to accept 2 Orion filters, and a step-down 2-1.25 adapter is included
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Brand: Orion   |   Manufacturer: Orion

Item Dimensions: 4 x 3.25 x 6 inches (10.2 x 8.3 x 15.2 cm)   |   Package Dimensions: 4.69 x 5.08 x 7.76 inches (11.9 x 12.9 x 19.7 cm)

First Available: 2018-12-12

Warranty: Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.

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  #16

Astromania 2" 45-Degree Erecting Prism Diagonal for Telescope

Model: SKU_AM_DP2D45   |    Mpn: SKU_AM_DP2D45   |    Ean: 6970019292953   |    PartNumber: SKU_AM_DP2D45   |   Asin: B01B2OR23U

Precision Prism - Image erecting BAK4 prism with anti-reflection coating. - High accuracy and high light reflection prism. - Brass compression ring. Superior Craftsmanship - Internally matte blackened and threaded for no internal stray light reflection. - Threaded for 2" filters. Ready to Go - 1.25" adapter with brass compression ring included. - Large, chromed thumbscrews. Beautiful Finish - Entirely aluminum, black anodized. - Smooth finish. Features: - Prism: High quality BAK4 with anti-reflection coating - Materials: Entirely machined aluminum - Angle: 45 degree - Prism clear aperture: 31mm - 2"-1.25" adapter with brass compression rings. If there is any problem of focusing due to the light path for a few telescopes, please feel free to contact us for help.

Features

  • Image erecting BAK4 prism with anti-reflection coating.
  • High accuracy and high light reflection prism.
  • Internally matte blackened and threaded for no internal stray light reflection.
  • 1.25 adapter with brass compression ring included.
  • Entirely aluminum, black anodized, smooth finish. If there is any problem of focusing due to the light path for a few telescopes, please feel free to contact us for help.
  • See more on Amazon...

Brand: Astromania   |   Manufacturer: Astromania

Item Dimensions: 3.8 x 4.87 x 7.23 inches (9.7 x 12.4 x 18.4 cm)   |   Package Dimensions: 3.8 x 4.9 x 7 inches (9.7 x 12.4 x 17.8 cm)

Amazon Price: $187.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $187.99

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  #17

Sports Bras for Women,Ladies'plain Color Front Cross Side Lace Sports Bra Full Cup Bra Vest Tops Black

 Ean: 0048219951355   |   Asin: B07SFWJSYV

1.Features: casual clothes, fashion design, summer casual vest

2.Material:Polyester. Polyester fiber ,Made from high quality fabric, lightweight soft and comfortable.

3.Unique round collar design makes it more sexy and attractive.

4.This is a super breathable, simple sports underwear.

5.PLEASE NOTE: Hand or gentle machine wash in cold water / Do not bleach / Line dry. Our clothes all are designed for Asian figure, which means would be smaller than normal European sizes. Please refer to our own size chart instead of Amazon size chart, and you can find it in our pictures or from the description.

Season:Summer

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Material:Polyester

Pattern Type:Pure color

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Length:Regular

Sleeve Length: Sleeveless

Size:S US:4 UK:8 EU:34 Bust:68-86cm/26.78-33.86" Lenght:30cm/11.82''

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  • See more on Amazon...

Brand: SRYSHKR

Amazon Price: $4.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $4.99

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  #18

Orion 8763 1.25-Inch Prism Star Telescope Diagonal

Model: 8763   |    Mpn: 8763   |    Ean: 0759270087630   |    PartNumber: 8763   |   Asin: B0000XMWYY

This precision 90-degree star diagonal for telescopes features fully coated prisms to deliver superior image fidelity. The prism diagonal features a machined aluminum eyepiece holder and a chrome-plated metal barrel that's conveniently threaded for 1.25" filters. The diagonal's eyepiece holder has a setscrew for locking the eyepiece securely in place. This telescope diagonal produces an image that is right-side up and reversed left to right (therefore, not recommended for terrestrial observing). Diagonals are not recommended for use in reflector telescopes. Fits in 1.25" telescope focusers and accepts 1.25"-diameter telescope eyepieces.

Features

  • For astronomical use, this diagonal produces an image that's right-side-up, reversed left to right
  • Fully coated prisms for superior image fidelity
  • Accepts 1.25 telescope eyepieces
  • Useful fro refractor and Cassegrain telescopes - not recommended for reflectors
  • Makes it easier to navigate the nigth skies with a telescope
  • See more on Amazon...

Brand: Orion   |   Manufacturer: Orion

Package Dimensions: 2.2 x 2.9 x 4.4 inches (5.6 x 7.4 x 11.2 cm)

Amazon Price: $35.99 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $42.01

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  #19

Baader Planetarium T-2/90 Degrees 32 mm High-Angle Prism with Eyepiece and Socket Connection - Black

Model: 2456005K   |    Mpn: 2456005K   |    Ean: 4047825011305   |    PartNumber: 2456005K   |   Asin: B002SYBIOS

Star Diagonal Prism. Manufacturer: Baader Planetarium. SKU (#): 2456005K. Weight (kg): 0.202. Optical Design: Star Diagonal Prism. Inner Connection (lens sided): Thread, T-2 (M42 x 0,75). Outer Connection (lens sided): Barrel, 1 ". Inner Connection (eyepiece/-camera-sided) Clamp, 1 ". Outer Connection (eyepiece/-camera-sided): Thread, T-2 (M42 x 0,75). Reflection surface: Total reflection. AR-Coating: High transmission multi-coated (HT-MC). Image Orientation: Erect image, Mirror inverted. Optical tube length: 64. Deflection angle: 90 . Inner Diameter / Clear Aperture (mm): 32

Features

  • High-angle prism T-2 / 90 degrees with 1.26 inch (32 mm) Prism into 11 / 4 "fittings
  • Connection eyepiece side: T-2 male thread Adjustable Focus and eyepiece clamp 11 / 4
  • Connection lens side: T-2 internal thread 1 1 / 4 barrel
  • Baader Planetarium High-Angle Prism T-2/90 Degrees with 32 mm Prism with Eyepiece and Socket Connection T-2 Component 14
  • See more on Amazon...

Brand: Baader-Planetarium   |   Manufacturer: Baader Planetarium

Item Dimensions: 6.1 x 2.56 x 4.53 inches (15.5 x 6.5 x 11.5 cm)   |   Package Dimensions: 2.68 x 4.17 x 6.14 inches (6.8 x 10.6 x 15.6 cm)

Amazon Price: $111.11 | as of 07/17/2019(10:49pm pst)
Availibility: Usually ships in 24 hours
List Price: $111.11

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