Best Telescope Diagonals (April 2024) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

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

9.8
CPR Score
Top 2

Orion 8727 2-Inch Dielectric Mirror Star Diagonal

9.8
CPR Score
Top 3

Orion 8879 1.25-Inch Enhanced Mirror Star Telescope Diagonal

9.5
CPR Score
Tips


Our team has recommended top 27 Telescope Diagonals to make your shopping easy after considering different features about Telescope Diagonals reviews of brands, including Celestron, SVBONY, Orion, Kesoto, Serounder, Almencla, Prettyia, Baosity, Oumij, Astromania, Taberies, 070, William Optics, A ALSTAR And Explore Scientific. And after researching, Celestron 2-Inch XLT Diagonal Mirror (for SCT T... is a highly recommended Telescope Diagonals item.

* Cherrypicksreviews.com is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Telescope Diagonals Rated by CherryPicks

Market Overview
Telescope Diagonals Reviewed
  • Reviews Analyzed: 921 Items
  • CPR Avg. Rating: 8.5 / 10
27 Products Evaluated
  • Highest Price: $210.95
  • Lowest Price: $8.89
  • Avg. Price: $85.49
Price Disclaimer

Top 27 Telescope Diagonals on Amazon (Verified You can Buy)

Top 1

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

Celestron
93527
7.0 x 8.0 x 8.0 Inches
3.0 Pounds
  • Unknown: English

Ratings for Celestron (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Focus Camera LLC 1,298

Features

2” SCT mirror diagonal with high performance XLT coatings
1/10th wave mirror is tested with an interferometer to ensure quality
Show More
Top 2

Orion 8727 2-Inch Dielectric Mirror Star Diagonal

Orion
8727
7.9 x 5.0 x 4.6 Inches
  • Unknown: English

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

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
Show More
Top 3

Orion 8879 1.25-Inch Enhanced Mirror Star Telescope Diagonal

Orion
8879
5.25 x 4.0 x 3.75 Inches
0.5 Pounds
  • Unknown: English

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

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
Show More
Top 4

Serounder Diagonal Lens,1.25" 90 Degree Optical Glass Astronomical Telescope Diagonal Mirror Erect Image Lens with Dust Cover for Telescope Eyepiece

Serounder
0.0 x 0.0 x 0.0 Inches
0.3748 Pounds

Ratings for Serounder (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Serounder-m -

Features

Easy to Use: 4 screws fix the base, for easy removal and cleaning.
Wide 90 Degree Angle: A 1.25 inch 90-degree Angle mirror ensures that the image is upright and just look down with a comfortable angle.
Show More
Top 5

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

A ALSTAR
SKU_AM_DP1D45AR
4.4 x 2.1 x 2.8 Inches
0.2 Pounds

Ratings for A ALSTAR (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Alstar Optics -

Features

High quality optical Prism inside rather than a mirror which makes your image clear and sharp.
1.25" 45-degree mirror star diagonal for any telescope with 1.25" connector (not suitable for Newtonians).
Show More
Top 6

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

Astromania
SKU_AM_DM1D90
4.42 x 2.8 x 2.11 Inches
0.2731 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

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.
Show More
Top 7

Dielectric Mirror, 1.25 Inch 90-Degree Dielectric Mirror Diagonal for Telescope

Serounder
Seroundermwgib6e7zs
2.5591 x 1.378 x 1.1811 Inches
100.0 Kilograms

Ratings for Serounder (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Serounder-m -

Features

All-surface multilayer coated.
Used for 1.25 inch focus seat and 1.25inch eyepiece.
Show More
Top 8

Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal

Orion
40901
4.5 x 1.75 x 3.0 Inches
0.5 Pounds

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

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!
Show More
Top 9

SVBONY SV188P Dielectric Mirror Star Diagonal, 1.25 Inch 90 Degree Mirror Diagonal, 99% Reflectivity Dielectric Coatings with Brass Compression Rings

SVBONY
FF9171B
4.4 x 3.3 x 2.4 Inches

Ratings for SVBONY (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SVBONY Direct 6,899

Features

Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing
1.25 inches nosepiece fits 1.25 inches telescopes; accepts standard 1.25in filters; eyepieces; Barlow lenses and other accessories with a 1.25in insert barrel
Show More
Top 10

William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors

William Optics
4331908557

Ratings for William Optics (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Agena AstroProducts -

Features

We don't know when or if this item will be back in stock.
Top 11

Diagonal Mirror, 5P0081 Black Refraction Astronomical Telescope Accessory 0.965 Inch 45° Diagonal Mirror for Astronomy Terrestrial Observation

070
0701arzcv93bq
0.0 x 0.0 x 0.0 Inches
0.0728 Pounds

Ratings for 070 (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Pomya -

Features

Four screws fix the base for convenient disassembly and cleaning.
Diagonal mirror suitable for astronomy and terrestrial observation.
Show More
Top 12

SVBONY Diagonal Adapter Zenith Diagonal Mirror Prism 1.25inch 45 Degree Erecting Prism Optical Prism Inside for Astronomical Telescope Eyepiece

SVBONY
FUSW2578A
3.7 x 2.36 x 2.16 Inches
0.18 Pounds

Ratings for SVBONY (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SVBONY Direct 6,899

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
High optical lens transparency;the large quality prism allows more light transmission;so that delievers a clear image
Show More
Top 13

Astromania 2" 45-Degree Erecting Prism Diagonal for Telescope

Astromania
SKU_AM_DP2D45
7.23 x 4.87 x 3.8 Inches
1.1938 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

Features

Image erecting BAK4 prism with anti-reflection coating.
High accuracy and high light reflection prism.
Show More
Top 14

Orion 52055 Pentaprism 1.25-inch Telescope Diagonal Mirror, Black

Orion
52055
6.5 x 6.0 x 4.5 Inches
0.5625 Pounds

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

Features

The Orion pentaprism diagonal is ideal for use with the Orion Premium linear binoviewer because the combination renders an upright non-mirror-reversed image
The pentaprism diagonal incorporates a pentagonal-shaped prism of BK-7 glass that is multi-coated and dielectric coated for maximum Light Transmission
Show More
Top 15

kesoto 0.965 Inch 90 Degree Correct-Image Star Telescope Diagonal/Telescope Erecting Prism with Caps

Kesoto

Ratings for Kesoto (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
kesoto 9,998

Features

Compatible with 0.965 inch telescope eyepieces.
Use the 90 degree diagonal mirror with a refractor telescope, the image is upright, with left and right reversed.
Show More
Top 16

1.25inch 45-Degree 31.7mm Erect Image Diagonal Mirror Astronomical Telescope Eyepiece Accessory Twist-Tight Dielectric Mirror Star Diagonal

Oumij
3.1496 x 1.5748 x 1.5748 Inches

Ratings for Oumij (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Oumij1 -

Features

This diagonal can correct upside down and left-right reversed image easily, which allows you view things during daytime in correct position.
Fits for 1.25inch telescope eyepiece and focuser. Work with Refractor and catadioptric telescopes. Plastic body with optical glass lens, providing clear and sharp image.
Show More
Top 17

Astromania 2" 90-Degree 99% Enhanced Dielectric Diagonal Mirror - Provide a Much Brighter Image Than with an Ordinary Star Diagonal

Astromania
SKU_AM_DM29099
2.2 x 2.2 x 1.18 Inches
1.5188 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

Features

2" Diagonal Mirror with 99% reflection, optics are made with Pyrex glass.
Multi-layered dielectric coatings that produce 99-percent reflectivity for brighter, sharper images.
Show More
Top 18

SVBONY SV138 Diagonal Mirror 1.25 inch 45 degree Correct Image Prism Diagonal Mirror Fully Metal for Refractor Astronomy Telescope with Dust Cover

SVBONY
FW9107A
7.1653 x 5.9055 x 3.0315 Inches
0.4375 Pounds

Ratings for SVBONY (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SVBONY Direct 6,899

Features

SV138 Diagonal Mirror fits for 1.25inch telescope eyepiece and focuser
Correct upside down and left-right reversed image easily;Even if you want to observe wildlife or other scenery during the day;SV138 diagonal mirror can also easily provide you with the right image
Show More
Top 19

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

Astromania
SKU_AM_DP1D452
4.42 x 2.8 x 2.11 Inches
0.25 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

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.
Show More
Top 20

Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902

Orion
40902
6.0 x 3.25 x 4.0 Inches
1.25 Pounds

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

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!
Show More
Top 21

Explore Scientific 2in 99% Reflectivity Diagonal Mirror DD02-00CF

Explore Scientific
DD02-00CF
7.0 x 7.0 x 6.0 Inches

Ratings for Explore Scientific (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
OpticsPlanet, Inc -
EXPLORE SCIENTIFIC -
Top 22

Astromania 2" 90-Degree Mirror Diagonal with 93% reflectivity Across Visible Spectrum

Astromania
SKU_AM_DM29093A
5.51 x 3.74 x 2.65 Inches
0.9063 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

Features

It fits all rear cells of Schmidt-Cassegrain telescopes equipped with a big, 2" focuser and can use with refractor telescopes with SCT adapter which you can find in our store(NOT INCLUDE).
The 2" diagonal features dielectric coatings with 93% reflectivity across the visible spectrum and a 1/10 wave mirror for bright and true images.
Show More
Top 23

Star Diagonal Telescope Diagonals 1.25 inch, 90 Degree Mirror Diagonal Erecting Image Prism Optic Telescope Accessory with Dust Cover

Taberies
3.15 x 3.15 x 3.15 Inches

Ratings for Taberies (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Taberies -
Top 24

Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal

Orion
8880
5.0 x 4.25 x 3.75 Inches
0.4211 Pounds
  • Unknown: English

Ratings for Orion (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Orion Telescopes & Binoculars -

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
Show More
Top 25

Prettyia 0.965 Inch/90 Degree Erecting Image Diagonal Mirror for Refractor Telescopes and Astronomical Telescope Eyepieces

Prettyia

Ratings for Prettyia (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
homozyUS -
Top 26

Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope) & 18778 AC Adapter (Black)

Celestron

Ratings for Celestron (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Product 1: 2” SCT mirror diagonal with high performance XLT coatings
Product 1: 1/10th wave mirror is tested with an interferometer to ensure quality
Show More
Top 27

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

Astromania
SKU_AM_DP1D45
4.42 x 2.8 x 2.11 Inches
0.1994 Pounds

Ratings for Astromania (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Astromania Optics -

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.
Show More

Top 10 Telescope Diagonals - Verified to Buy (Apr. 2024)

Top 10 Telescope Diagonals Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • Celestron
  • Orion
  • Serounder
  • A ALSTAR
  • Astromania
  • SVBONY
  • William Optics
  • 070
  • Kesoto
  • Oumij

Top 10 Telescope Diagonals Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 Focus Camera LLC 2,701 4.8
🥈 SVBONY Direct 802 4.9
🥉 OpticsPlanet, Inc 487 4.6
4 Amazon.com 385 4.7
5 Serounder-m 305 4.4
6 Astromania Optics 276 4.9
7 mbrtyety us 242 4.0
8 Baosity 218 4.4
9 kesoto 211 4.1
10 Orion Telescopes & Binoculars 193 4.8
View or download top Telescope Diagonals seller & rating report
Focus Camera LLC [2701] SVBONY Direct [802] OpticsPlanet, Inc [487] Amazon.com [385] Serounder-m [305] Astromania Optics [276] mbrtyety us [242] Baosity [218] kesoto [211] Orion Telescopes & Binoculars [193] Focus Camera LLC 46% SVBONY Direct 14% OpticsPlanet, Inc 8% Amazon.com 7% Serounder-m 5% Astromania Optics 5% mbrtyety us 4% Baosity 4% kesoto 4% Orion Telescopes & Binoculars 3%

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Why Should You Trust Us?

Now hundreds and thousands of Accessories supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Telescope Diagonals to buy for new April 2024?

CherryPicks’s Methodology for Evaluating Telescope Diagonals

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Accessories items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 99 of Telescope Diagonals reviews based on our selection criteria. It helped us shortlist the top qualified and rated Telescope Diagonals for Accessories, We found that most customers choose Telescope Diagonals with an average price of $85.49, and the top brands are Celestron, SVBONY, Orion, Kesoto, Serounder, Almencla, Prettyia, Baosity, Oumij, Astromania, Taberies, 070, William Optics, A ALSTAR And Explore Scientific. 

Then our expert-level editors reviewed all those quality items and selected the top 27 Telescope Diagonals for you, We have researched hundreds of sellers and picked the top sellers for Accessories, including Focus Camera LLC, SVBONY Direct, OpticsPlanet, Inc, Amazon.com, Serounder-m, Astromania Optics, mbrtyety us, Baosity, kesoto, Orion Telescopes & Binoculars, Pomya And Oumij1. The Celestron 2-Inch XLT Diagonal Mirror (for SCT T... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 210 consumers with an average rating of 4.7.

We've helped a lot of satisfied users get the right Camera & Photo Products product based on their needs, and save lots of time for them to pick Telescope Diagonals to buy.


Written By James Wood

Who does not like electronics? Well, your love for it is not enough, you need to know the best one to buy and James is here for you. He is a tech enthusiast with an interest in testing out new electronics finding faults and looking out for what is best about them.