The 6 Best 90 degree Diagonal mirrors (2023 reviews)

If you often find yourself confused about convenient and suitable mirror, serounder 90 degree diagonal mirror is your solution. It is a very good diagonal with a clear image. It is constructed with aluminum alloy housing and stainless steel cover plate, available for long lifespan. The image is inverted (upside down) as these diagonals usually do and it is clear, in focus. It is used for 1.25 inch focus seat and 1.25inch eyepiece.

Why We Like This:

Good investment for long term
New and hot release

Astromania 90 degree Diagonal Mirror

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Astromania line of mirror come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. It fits all rear cells of schmidt-cassegrain telescopes equipped with a big, 2" focuser and can use with refractor telescopes with sct adapter asin. It allows you to take advantage of the wider field of view provided by two inch eyepieces. It features a brass clamping ring which does not mar, and provides a more secure connection. It makes observations quite comfortable when the telescope is at or near the zenith.

The 2" diagonal features dielectric, comes with dielectric coatings for the most light transmission possible. The nose piece and eyepiece holder both have the same threading so are interchangeable. It comes with dielectric coatings for the most light transmission possible.

Why We Like This:

Edge to edge clarity with no noticeable distortions or abberations
Fogs up when the humidity is higher than
Good investment for long term

Astromania correct image

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The astromania correct image should be able to handle its purpose and duties with ease. The high quality of the mirror makes the image seen clearer and brighter. It provides a comfortable 90 degree view from your refractor. The two mirror tubes are made of metal to make the structure stronger and more durable. It has a 1.25" metal barrel. The diagonal is well worth it and value is terrific.

The mirror has everything that is possible optimised, so it is the link between your eye and the telescope. It is fits for a 1.25" eyepiece and telescope. The image is sharper, cleaner, and brighter.

Why We Like This:

Gets the job done with smaller budget telescopes
For more comfortable overhead viewing through refractor and cassegrain type telescopes
Delivers what they promise

a Alstar 90 degree Diagonal Mirror

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The a alstar 90 degree diagonal mirror should be able to handle its purpose and duties with ease. This Alstar star diagonal has a 1.25" metal barrel. The clamping screws lock the barrel firmly in place without scoring the nosepiece, as is the case with many cheaper products. It is made with machined metal and a quality mirror. The chrome finish not only looks good, but is also practical, as the star diagonal always remains firmly attached to the focuser. This barrel will keep your star diagonal in condition for virtually forever.

Why We Like This:

Useful for refractor and cassegrain telescopes
Protective coating on the mirror to ensure a long life, metal barrel
One of the new comers and featured product

Funtasica 90 degree Diagonal Mirror

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Funtasica is known for creating pragmatic and minimalist mirror for people on the go, and its line of funtasica 90 degree diagonal mirror definitely falls in line with that reputation. It comes with a wide 90 degree angle, and it is comfortable for you to view image from refractor.

Why We Like This:

Ensures high light transmission and provides high images
One of the new comers and featured product

Xccyg 90 degree Diagonal Mirror

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate mirror. The xccyg 90 degree diagonal mirror is exactly that - it's a simple mirror that hits all the right notes.

Why We Like This:

Work with refractor and catadioptric telescopes
Made of aluminum alloy and durable
Fully coated lens come with dust cover