We are backed by our readers, when you click and buy through the links on our site we earn an affiliate commission.

30 Best star diagonal in 2022: Analysis Based on 423 Reviews

Choosing the right star diagonal is not an easy task and if not researched properly, you may even end up getting a bad quality star diagonal.

To help you choose the right one, I’ve analyzed over 423 customer reviews and have made a list of 30 best possible options.

IMAGE
NAME
CHECK PRICE
1
Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock
Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock
9.9
2
Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal
Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal
9.6
3
SVBONY SV188P Dielectric Mirror Star Diagonal, 1.25 Inch 90 Degree Mirror Diagonal, 99% Reflectivity Dielectric Coatings with Brass Compression Rings
SVBONY SV188P Dielectric Mirror Star Diagonal, 1.25 Inch 90 Degree Mirror Diagonal, 99% Reflectivity Dielectric Coatings with Brass Compression Rings
9.5
4
Celestron 90° Dielectric Star Mirror Diagonal with Twist Lock (1.25")
Celestron 90° Dielectric Star Mirror Diagonal with Twist Lock (1.25")
9.3
5
Celestron 1.25" Star Diagonal, Black (94115-A)
Celestron 1.25" Star Diagonal, Black (94115-A)
9.0
6
Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal
Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal
8.8
7
Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902
Orion 20-Inch Twist-Tight Dielectric Mirror Star Diagonal, Black, Medium 40902
8.7
8
SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter
SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter
8.4
9
Skytele Star Diagonal Telescope Diagonals 1.25 inch, 90 Degree Mirror Diagonal Erecting Image Prism Optic Telescope Accessory with Dust Cover
Skytele Star Diagonal Telescope Diagonals 1.25 inch, 90 Degree Mirror Diagonal Erecting Image Prism Optic Telescope Accessory with Dust Cover
8.3
10
1.25 Inch 45 Degree Diagonal Mirror Adapter Correct Erect Image Prism Dielectric Mirror for Astronomical Telescope Eyepiece
1.25 Inch 45 Degree Diagonal Mirror Adapter Correct Erect Image Prism Dielectric Mirror for Astronomical Telescope Eyepiece
8.0

Best star diagonal in 2022 [Top Picks]

My top picks when it comes to star diagonal are: Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock and the Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal. However, the right one depends a lot on the use-case. So it’s not necessary that my top picks are best suited for your use-case. That’s why I’ve also included 28 other decent options.

1

Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock

Check On Amazon
Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock

Features

  • Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings
  • Twist-lock keeps the eyepiece centered in the diagonal to provide better optical alignment
  • Includes a Stepdown adapter, so the diagonal accepts eyepieces, Barlow lenses, threaded filters, and other accessories in both 2” and 1. 25” sizes
  • 58 layers of dielectric coatings provide an over 99% reflective surface, ensuring the maximum amount of light collected by the telescope reaches the eyepiece
  • Provides a 90° viewing angle, perfect for more comfortable viewing through refractor and cass grain-type telescopes
2

Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal

Check On Amazon
Orion 8880 1.25-Inch Dielectric Mirror Star Diagonal

Features

  • Machined and anodized aluminum housing features machine-threaded baffles for optimized contrast
  • Dielectric mirror coatings are more durable and more reflective than enhanced aluminum coatings
  • 90 diagonal features sophisticated, lab-tested dielectric coatings that boast an astounding 99 percent reflectivity
  • Diagonal provides a comfortable 90-degree viewing orientation when observing the night sky through a refractor, Maksutov-Cassegrain (Mak-Cass) or Schmidt-Cassegrain telescope
  • 1.25" nosepiece barrel is threaded to accept like-sized Orion eyepiece filters
3

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

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

Features

  • 90 degree viewing angle; diagonal reflects the telescope’s light path 90 degree to provide a more comfortable viewing angle; best for observing objects overhead
  • 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
  • Brass compression ring; Built in brass ring and thumbscrew accessories avoid eyepiece to rotate during adjustments; effortless fixes more firmly and will not scratch your eyepieces barrels
  • Correct upside down and left right reversed image; the view image is upright; but left and right reversed if use the 90 degrees to your telescope
  • Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing
4

Celestron 90° Dielectric Star Mirror Diagonal with Twist Lock (1.25")

Check On Amazon
Celestron 90° Dielectric Star Mirror Diagonal with Twist Lock (1.25")

Features

  • 58 layers of dielectric coatings provide an over 99% reflective surface, ensuring the maximum amount of light collected by the telescope reaches the eyepiece
  • Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings
  • Twist-lock keeps the eyepiece centered in the diagonal to provide better optical alignment
  • Provides a 90° viewing angle, perfect for more comfortable viewing through refractor and Cassegrain-type telescopes
  • Accepts standard eyepieces, Barlow lenses, threaded filters, and other accessories with a 1.25” barrel
5

Celestron 1.25" Star Diagonal, Black (94115-A)

Check On Amazon
Celestron 1.25" Star Diagonal, Black (94115-A)

Features

  • Country Of Origin: China
  • Product Type: Binocular
  • Item Package Dimensions:4.5"L X2.25"W X3"H
  • Fits Telescopes With 1.25” Focusers Or Visual Backs, 90° Viewing Angle, Best For Observing Objects Overhead
6

Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal

Check On Amazon
Orion 1.25 Inch Twist-Tight Dielectric Mirror Star Diagonal

Features

  • Twist-tight clamping mechanism grips inserted eyepieces more securely than typical thumbscrew-equipped diagonals - without scratching!
  • 1.25", 90-degree mirror diagonal features sophisticated dielectric coatings with highly efficient 99% reflectivity for peak performance
  • Nosepiece barrel threaded to accept 1.25" Orion filters
  • 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
7

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

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

Features

  • 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
  • This 2", 90-degree mirror diagonal features sophisticated dielectric coatings with highly efficient 99% reflectivity
8

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

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

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
  • 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
  • Dielectric diagonal is especially important;A standard aluminized diagonal has about 92% reflectance;And this decreases with time as the aluminum mirror surface ages
  • 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)
9

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

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

Features

  • 90 degree angle star-diagonal ensures that the image is upright but upside down
  • Standard 1.25in diameter fits for 1.25in telescope focuser
  • Made of high quality materials, sturdy, durable and long using life;This product is a 90 degree diagonal mirror, and the Inside is a prism
  • This star diagonal with special anti-slip rubber protoction design can prevent from scratches
  • 4 screws fix the base, for easy removal and cleaning;With dust cover, can keep the lens clean for clear viewing and long using
10

1.25 Inch 45 Degree Diagonal Mirror Adapter Correct Erect Image Prism Dielectric Mirror for Astronomical Telescope Eyepiece

Check On Amazon
1.25 Inch 45 Degree Diagonal Mirror Adapter Correct Erect Image Prism Dielectric Mirror for Astronomical Telescope Eyepiece

Features

  • Multi-layer green film coating on prism surface and high quality optical performance provide you a clearer and wider field of view.
  • Durable, this product is made of high quality material, metal CNC, aluminum alloy housing and stainless steel cover.
  • Fits for 1.25inch telescope eyepiece and focuser. Work with refractor and catadioptric telescopes.
  • This lens can correct upside down and left-right reversed image easily, which allows you view things during daytime in correct position.
  • Wide 45 degree angle makes you view correct image from refractor telescope stand and just look down with a comfortable angle.
11

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

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

Features

  • Suitable for refractors, Schmidt-Cassegrains, ACF, EdgeHD and Maksutov-Cassegrains.
  • 2" - 1.25" reducing sleeve with brass compression ring, non-marring compression safety secures the eyepieces.
  • Comes with dielectric coatings for the most light transmission possible.
  • 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.
12

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

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

Features

  • 1.25inch 90 degree diagonal mirror using with refrator telescope and makes the image upright though left and right reversed, does not affect astronomical observation
  • The lens come with lens cover, keep your lens clean for superior image fidelity
  • Standard 1.25 inch diameter, right fit for focuser , work with refractor and catadioptric telescopes
  • Wide 90 degree angle, you can view correct image from refractor telescope stand and just look down with a comfortable angle
  • This star diagonal with special anti-slip rubber protoction design can prevent from scratches
13

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

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

Features

  • Any question,please feel free to contact us ,we will reply to you soon.
  • Comes with dust cover to keep your lens clear, easy to install and use.
  • 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.
  • This diagonal can correct upside down and left-right reversed image easily, which allows you view things during daytime in correct position.
  • Wide 45 degree angle makes you view correct image from refractor telescope stand and just look down with a comfortable angle.
14

gazechimp 0.965inch Star Diagonal Erect Image Prism + 35 Degree H12.5mm H6mm Eyepiece Set for Astronomy Telescope

Check On Amazon
gazechimp 0.965inch Star Diagonal Erect Image Prism + 35 Degree H12.5mm H6mm Eyepiece Set for Astronomy Telescope

Features

  • Fully Coated:high quality optical glass for maximum brightness.
  • High Refractivity:built-in high-definition refractive prism, to create a more comfortable viewing position and clear image.
  • 0.965"/24.5mm astronomy telescope refractor erecting prism diagonal mirror 45 degree + H12.5mm & H6mm telescope eyepiece multi-coated 0.965"/24.5mm.
  • H12.5mm+H6mm Telescope Eyepiece:35 Degree Field of View: Wide viewing field with extra sharpness and long eye relief.Suitable for 0.965"/24.5mm telescope eyepiece filters.
  • Just insert into 0.965" telescope, and then fix the eyepiece by the screw.
15

Baader Planetarium FlipMirror II Star Diagonal

Check On Amazon
Baader Planetarium FlipMirror II Star Diagonal

Features

  • Baader-FlipMirror II Star Diagonal (BFM II) with three ports:
  • Straight-through (S52, M48 and T-2 on both sides) for full-frame camera, spectrograph or other instruments
  • Baader Planetarium FlipMirror II Star Diagonal with Fine-Optically Polished Movable Mirror - Laterally Adjustable T-2a Top Ring - 2x M48i / S52 Dovetail Ring - Reducing Ring M48a / T-2i - Reducing Ring M48a / T-2a - Inverter Ring M48a / M48a - Pin Type Face Wrench for M48 / T-2 and M4 Counter Nuts - 3mm Screwdriver for M4 Brass Adjustment Screws - 4x Hex Keys (2.5/2.0/1.5/1.3mm) - Bottom Flange - Dust Cap - 2x M48 Dust Caps - T-2 Dust Cap - Baader Planetarium 2 Year Limited Warranty
  • Bottom flange for the optional Off Axis Guider for Baader FlipMirror II (BFM-OAG)or for an optional calibration lamp for quick calibration of spectra without removing the spectrograph
  • Adjustable T-2 thread on top for eyepiece clamps, video modules (up to 32mm image circle) or even a binoviewer
16

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

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

Features

  • Includes a 2” to 1.25” adapter and aluminum carry case
  • 1/10th wave mirror is tested with an interferometer to ensure quality
  • Housing is precision machined to achieve and hold good optical alignment.
  • 2” SCT mirror diagonal with high performance XLT coatings
17

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

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

Features

  • Work with refractor and catadioptric telescopes;not for reflector telescope
  • Body material is full metal;optical glass lens provide clear and sharp image With dust cover always keep your lens clear prolong life
  • Wide 90 degree angle;you can view correct image from refractor telescope stand and just look down with a comfortable angle
  • Standard 1.25'' diameter; fit for 1.25'' eyepiece and telescope focuser;Note;not suitable for Newtonians
  • Super easy to use;just insert into 1.25'' telescope at the silver end;the other end fix 1.25'' eyepiece by the screw
18

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

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

Features

  • Fully 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 
  • Standard 1.25'' diameter;fit for 1.25'' focuser and eyepiece;work with refractor and catadioptric telescopes;not recommended for reflector telescope
  • 1.25" 90 degree diagonal mirror using with refrator telescope and makes the image upright;though left and right reversed;not affect astronomical observation
  • Made of aluminum alloy and durable
19

Astromania 2" 45-Degree Erecting Prism Diagonal for Telescope

Check On Amazon
Astromania 2" 45-Degree Erecting Prism Diagonal for Telescope

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.
  • 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.
  • 1.25" adapter with brass compression ring included.
20

1.25" 90 Degree Diagonal Adapter Erecting Image Positive Prism Optic Mirror for Telescope Eyepiece Accessories

Check On Amazon
1.25" 90 Degree Diagonal Adapter Erecting Image Positive Prism Optic Mirror for Telescope Eyepiece Accessories

Features

  • Easy to install and use. Just insert into 1.25in telescope at the silver end,the other end fix 1.25in eyepiece by the screw.
  • The body is constructed of high quality materials, sturdy and not easy to damage.
  • Wide 90 degree angle allows you to view correct image from refractor telescope stand and just look down with a comfortable angle.
  • Designed for refractor and catadioptric telescopes, and not for reflector telescope.
  • Standard 1.25in diameter fits for 1.25in eyepiece and telescope focuser.
21

Celestron Erect Image Prism for Refractor and Schmidt Cassegrain

Check On Amazon
Celestron Erect Image Prism for Refractor and Schmidt Cassegrain

Features

  • This 1.25” diagonal produces right side up and left-to-right correct images when used with refractors and catadioptric (Schmidt-Cassegrain) telescopes
  • A great accessory for daytime terrestrial viewing with your telescope
  • Package Weight: 136.08 grams
  • Inserts into 1.25” focusers or visual backs; accepts standard 1.25” eyepieces
22

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

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

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).
  • Associated with 90°mirror diagonals, which let you view objects that are at a 90°angle from the direction the telescope is pointing.
  • Improved attachment design features a brass clamping ring which does not mar, and provides a more secure connection.
  • The 2" diagonal features dielectric coatings with 93% reflectivity across the visible spectrum and a 1/10 wave mirror for bright and true images.
  • Allows you to take advantage of the wider field of view provided by two inch eyepieces. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product.
23

Barska AB10520 Encounter 20x, 40x100 Waterproof High Power Jumbo Binoculars with Premium Hard Case for Astronomy Stargazing and Long Range Viewing

Check On Amazon
Barska AB10520 Encounter 20x, 40x100 Waterproof High Power Jumbo Binoculars with Premium Hard Case for Astronomy Stargazing and Long Range Viewing

Features

  • Large semi-apochromatic 100mm objective lenses with high quality BAK-4 prisms
  • Dual power interchangeable 20x and 40x eyepieces of high power viewing
  • Multi-coated optics coupled with the large 100mm objective lens maximizes light transmission, enhancing clarity
  • 100mm Large Objective Lens
  • Waterproof construction with a rigid all -metal body
  • Extendable Sunshades
  • 20x & 40x Eyepieces
  • Both Day and Night Viewing
  • Ideal for celestial and terrestrial observations, and packaged in a premium aluminum hard case for protection and storage
24

Celestron 94107 Variable Polarizing Filter 1.25"

Check On Amazon
Celestron 94107 Variable Polarizing Filter 1.25"

Features

  • Simple to use—just rotate filter’s lower ring to adjust brightness
  • Threads onto any Celestron 1.25” eyepiece
  • A customizable way to reduce brightness and glare on the brightest celestial objects like the moon, Venus, and bright double stars
  • Adjust the level of light transmission from 1-40% for the best possible view for your specific target and current viewing conditions
25

Astromania 1.25" Astrophotography Flip Mirror with Eyepiece Adapter

Check On Amazon
Astromania 1.25" Astrophotography Flip Mirror with Eyepiece Adapter

Features

  • An advantage with all cameras: No finder is provided with popular webcams or astronomical CCD cameras for helping position the object on the chip. Only by taking test exposures is it possible to achieve both sharp focus and the correct object position. The flip mirror is a big help here as the object has already been centred and focused 'remotely' on the chip via the eyepiece.
  • Always sharp: If you tilt the mirror to the 45° position, the object will then appear in the eyepiece and you will be able to precisely focus it as usual. The helical focuser on the flip mirror lets you make the eyepiece and camera exactly parfocal with each other. This means that both elements will be in focus at the same time.
  • Connectability: The Astromania flip mirror has a 1.25" connector which will fit onto any standard telescope. The helical focuser will accept any standard 1.25" eyepiece. There is a T-2 thread provided on the camera side - the standard fitting for all cameras.
  • For precise focusing: In astrophotography, if you want to take successful astronomy photographs, accurate focusing is only one half of the story. The Astromania flip mirror makes it very simple to find both the exact focus point and also the correct positioning for your astronomy photographs. This small black box has a moveable flip mirror which shunts the light path 90°upwards or, alternatively, lets it pass through unhindered.
  • An object that is accurately centred in the eyepiece will be simultaneously centred in the camera's field of view. You no longer have to worry about whether the object is correctly positioned on the chip - you know it will be.
26

AOMEKIE Telescope for Kids Adults and Astronomy Beginners 70mm/400mm Refractor Telescope with Moon Filter Finderscope Phone Adapter and Adjustable Tripod

Check On Amazon
AOMEKIE Telescope for Kids Adults and Astronomy Beginners 70mm/400mm Refractor Telescope with Moon Filter Finderscope Phone Adapter and Adjustable Tripod

Features

  • Powerful Magnification: Comes with the 400mm focal length and 2 replaceable Kellner eyepieces (k25mm/k6mm), the astronomical telescope can magnify the target up to 16x/67x. The 70mm large aperture objective lens captures more light and makes the images brighter and clearer.
  • Useful Tripod: The tripod of the travel telescope provides a stable viewing platform. With the pan handle and rotatable joint of the tripod, you can easily adjust the optic angle of 180° in the vertical direction and 360° in the horizontal direction. The height of the telescope is between 16.1in -51.6in adjustable. Allowed for many different observational positions.
  • Besser Observation: Equipped with the 45° erecting diagonal lens, man will always see the images that are as normal as the real scene. The 360° rotatable design of the diagonal lens allows you to find the most comfortable angle to observe the target. Ideal for both terrestrial and astronomical observing.
  • Abundant Accessories: The refractor telescope provides useful accessories to achieve besser Observation. 5X24 Finderscope helps you locate the objects faster and easier. The moon filter will reduce the glare of the full moon and you can see more details. The constellation map helps you know various stars.
  • Easy to use: No tools are required and the installation of the stargazing telescope can be finished in minutes even by a beginner. With the free delivered phone adapter, you can directly photograph distant scenery and share it with friends.
27

Solomark Collimation Eyepiece - 1.25Inch Cheshire Without Laser for Newtonian Telescopes and Reflectors - Metal, Long

Check On Amazon
Solomark Collimation Eyepiece - 1.25Inch Cheshire Without Laser for Newtonian Telescopes and Reflectors - Metal, Long

Features

  • Special eyepiece fits into 11/4" focusers or diagonals.
  • With Dustproof and MoistProof Rubber Cover-Expert Design-CNC Machine Made- Precise Surface Dealing
  • When collimating a refractor you should put the Cheshire directly into the focuser.
  • Collimation eyepiece is more accurate than the simple Collimation Tool
  • For aligning optics of Newtonian reflectors, Dobsonian reflectors, and Schmidt-Cassegrain Telescopes (SCTs)
28

Sky-Watcher Skymax 150mm Maksutov-Cassegrain - Large Aperture Compound-Style Reflector Telescope

Check On Amazon
Sky-Watcher Skymax 150mm Maksutov-Cassegrain - Large Aperture Compound-Style Reflector Telescope

Features

  • EVERYTHING YOU NEED: The 150mm Skymax Maksutov-Cassegrain comes equipped with everything you need to get started, including: : a 28mm 2-inch eyepiece, 2-inch 90-degree star diagonal, and a 9x50 straight-through finderscope.
  • 94% REFLECTIVITY MIRROR COATINGS: Using a borosilicate primary mirror with an aluminum coating and a quartz overcoat, Sky-Watcher Maksutov-Cassegrains produce a 94% reflectivity rating for outstanding light transmission.
  • VIXEN-STYLE DOVETAIL: An industry standard, the Vixen-style dovetail is the most commonly used dovetail bar for astronomy.
  • EXPERTLY MATCHED OPTICS: The Skymax series of Maksutov-Cassegrain optical tubes features matched primary and secondary mirrors with an expertly coated corrector plate that delivers contrast-rich views with charcoal-black skies.
  • FULLY BAFFLED TUBE: Utilizing a fully-baffled tube, Sky-Watcher Maksutovs prevent stray light from interfering with your viewing experience.
29

Orion Observer 80ST 80mm Equatorial Refractor Telescope Kit

Check On Amazon
Orion Observer 80ST 80mm Equatorial Refractor Telescope Kit

Features

  • An ideal refractor telescope package for the observer on-the-go, the compact Observer 80ST packs a lot of performance into a petite telescope design
  • Value-packed telescope kit also includes a 2x Shorty Barlow, MoonMap 260, Orion Telescope Observer's Guide book, Star Target Planisphere, and RedBeam Mini LED keychain flashlight
  • Includes two 1.25" telescope eyepieces, red-dot aiming sight, smooth rack and pinion focuser, 90-degree mirror diagonal for comfortable viewing, and more!
  • The included EQ-1B equatorial mount and adjustable-height tripod allows smooth slow-motion movement to easily track objects in the sky
  • Telescope Kit includes extra value-packed accessories for a fun stargazing experience
30

Sky-Watcher EvoStar 120 APO Doublet Refractor – Compact and Portable Optical Tube for Affordable Astrophotography and Visual Astronomy

Check On Amazon
Sky-Watcher EvoStar 120 APO Doublet Refractor – Compact and Portable Optical Tube for Affordable Astrophotography and Visual Astronomy

Features

  • EVERYTHING YOU NEED: The EvoStar 120 comes complete with a foam-lined aluminum hard case, 8x50 Right Angle Correct Image (RACI) Finderscope, 2” Dielectric Diagonal, 5mm and 25mm LET Eyepiece, 1.25” Adapter, Mounting Rings and a V-Style Dovetail
  • 10:1 DUAL-SPEED FOCUSER: No matter the eyepiece or camera, finding focus is a breeze with this 10:1 dual-speed Crayford-style focuser
  • EXPERTLY MATCHED GLASS: The EvoStar series features a matched doublet objective including one synthetic fluorite element, providing excellent color correction for visual and photographic uses
  • EVOLVES WITH SKILL: No need to replace this telescope as your skill set evolves. Whether you’re a seasoned astrophotographer or a budding novice, EvoStar refractors are versatile enough to use as your primary optical tube as your skill-set improves
  • OUTSTANDING COLOR CORRECTION: Using the finest quality glass and proprietary Metallic High-Transmission Coatings (MHTC), EvoStar refractors produce tack sharp images with accurate color and minimal aberrations

Best star diagonal Brands

Based on my research, here are the most reputed star diagonal brands/sellers

  • Celestron
  • Orion
  • SVBONY
  • Skytele
  • Serounder
  • Astromania
  • Taberies
  • Oumij
  • Gazechimp
  • Baader Planetarium
  • BARSKA
  • AOMEKIE
  • SOLOMARK
  • Sky Watcher

Shoppers Guide

Like said above, if not researched properly you may end up purchasing a bad quality star diagonal, to make sure that you’re not spending money on the wrong item, I’m adding this short buyer’s guide to assist you.

1. Buy only if you need

With the increase in eCommerce websites, purchasing anything is just a click away. That’s why a lot of people end up purchasing stuff they don't need. One way to manage this is: add the item to your cart, wait for 7-8 days before ordering it. Look at your cart after 7-8 days, if you still feel like ordering it then order it.

2. Your requirements vs Product offering

There’s no point in purchasing a star diagonal that doesn’t solve your needs, similarly, there’s no point in overspending for a feature you won’t need/use. The aim is to find a star diagonal that has all the features you need and is in your budget.

3. Decide the features before deciding on a budget

One of the biggest mistakes we make is, we decide a budget first and then start picking the features. This way, we end up limiting our feature set based on the budget. So for instance, a feature you want the most isn’t available in your budget. In a situation like this, most of them end up sacrificing a feature they wanted the most. That’s why I always ask my readers to choose the features before setting a budget.

4. Check Historical Prices

One of the best ways to not overpay for any item is by checking the historical prices and making sure that you’re not purchasing it on the day where the price of the product is on peak or is on the higher end. There are many websites and browser extensions/add-ons that’d allow you to check historical prices of products on websites like Amazon, BestBuy, etc.

5. Compare different options and choose the one that’s suitable for your needs.

The good thing about the internet is it allows you to research different options that sort your needs. For instance, you can compare two star diagonal options that come with all the features you need and pick the right one for your needs.

Verdict

It doesn’t matter what your star diagonal needs are, this article aims to help you find the right star diagonal option for your use case.

  • If you’re looking for the best possible star diagonal then you can consider getting the: Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock, as it comes with the most advanced feature set.
  • If you’re looking for a budget star diagonal option, then you can consider 1.25 Inch 45 Degree Diagonal Mirror Adapter Correct Erect Image Prism Dielectric Mirror for Astronomical Telescope Eyepiece, as it comes with most features and costs much lesser than the Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock
  • If you’re looking for a cheap star diagonal with some decent features, then you shall consider getting the Sky-Watcher EvoStar 120 APO Doublet Refractor – Compact and Portable Optical Tube for Affordable Astrophotography and Visual Astronomy, as it’s not only cheap but also comes with decent features.

Still haven’t found the right star diagonal? Feel free to get in touch with the INDThemes team using our contact page.

Mark Hill

It has been six years now since Mark Hill first began covering news on technology. Though it began out of his love for the tech, it grew into his profession and gave him all the name and fame he has today.

Comments
There are no comments yet.
Got any query? or Comment?

Please put your query or comment in the below box. You email address will not be published. Required fields are marked *

Your message is required.