The 7 Best 1.25 Diagonal mirrors (2023 reviews)

We consider a 1.25 diagonal mirror to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Celestron Diagonal Mirror Buy: READ REVIEW

Astromania 1.25 Diagonal Mirror Buy: READ REVIEW

Celestron 1.25 Diagonal Mirror Buy: READ REVIEW

a Alstar 1.25 Diagonal Mirror Buy: READ REVIEW

Astromania correct image Buy: READ REVIEW

Lingofoto 1.25 Diagonal Mirror Buy: READ REVIEW

Xccyg 1.25 Diagonal Mirror Buy: READ REVIEW

Celestron Diagonal Mirror

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Next on the list, we've got yet another mirror that manages to win our hearts. It's the celestron diagonal mirror and it's widely considered as one of the best convenient mirror you can buy. It can carry the weight of these big eyepieces. It serves the function of the visual back AND the star diagonal, and does NOT require any additional parts to attach to Celestron SCTs. It has a type of horseshoe clamp inside to hold both size eyepieces securely. 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.

The installation of the diagonal is simple and straight forward. It attaches directly to the back of the OTA replacing the visual back. It feels very sturdy and well-made, and the ring that attaches to the rear of the scope is solid metal like the rest of the item. It allows clearance to allow the telescope point upwards on an nextar mount.

• Allows 2" eyepieces to mix with 1-1/
• High quality diagonal with a beautiful fit and finish
• A beautiful and convenient case for storing a diagonal mirror

Astromania 1.25 Diagonal Mirror

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The astromania 1.25 diagonal mirror is specially designed for your daily usage and has all useful features. The Degree 99% enhanced dielectric diagonal mirror uses multi-layered dielectric coatings in order to ensure a maximum reflection of 99% with the highest contrast and optimal sharpness. It is made with pyrex glass. It features a brass clamping ring which does not mar, and provides a more secure connection. It is metal, making the product more durable. It makes observations quite comfortable when the telescope is at or near the zenith. It is the use of a good objective or the best eyepiece if the star diagonal is inferior. It is compatible with both slip-fit and crew-on mounting systems. It comes with dielectric coatings for the most light transmission possible.

• Percent reflectivity for brighter, sharper images
• Multi-layered dielectric coatings & 99% reflectivity
• A superb diagonal offering excellent mechanical and optical quality

Celestron 1.25 Diagonal Mirror

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If you are currently in the market looking for a reliable mirror for your daily usage, you cannot go wrong with the celestron 1.25 diagonal mirror. Running your telescope off of ac power is hassle-free and much more reliable than other methods, especially in cool temperatures, when batteries can lose charge quickly. The Celestron 18778 ac adapter (black)enjoy your telescope without batteries with this ac adapter. It includes a 2” to 1.25” adapter and aluminum carry case. The mirror 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.

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. It is precision machined to achieve and hold good optical alignment. When using your telescope at home or near any wall outlet, you can enjoy hours of uninterrupted observing.

• Sct mirror diagonal with high performance xlt coatings
• Power your celestron computerized telescope from any ac wall outlet
• New and hot release

a Alstar 1.25 Diagonal Mirror

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Next on the list, we've got yet another mirror that manages to win our hearts. It's the a alstar 1.25 diagonal mirror and it's widely considered as mirror that has the most suitable features. This Alstar 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. This barrel will keep your star diagonal in condition for virtually forever. It is made with machined metal and a quality mirror.

• Useful for refractor and cassegrain telescopes
• Protective coating on the mirror to ensure a long life, metal barrel
• Lot of satisfied buyers

Astromania correct image

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Best part: astromania correct image costs comparatively low and it is available to ship in 24 hours. The diagonal mirror is designed for use with telescopes that have a 1.25 inch diameter optical path. This wide 90 degree angle makes you view the correct image from telescope stands. It is threaded for filters. The high quality of the mirror makes the image seen clearer and brighter.

This barrel will keep your star diagonal in condition for virtually forever. The diagonal is well worth it and value is terrific. It fits for a 1.25" eyepiece and telescope.

• Gets the job done with smaller budget telescopes
• Protective coating on the mirror to ensure a long life
• New and hot release

Lingofoto 1.25 Diagonal Mirror

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The lingofoto 1.25 diagonal mirror is satisfactory and appropriate and fits well with your regular usage. The method of using a right-angle prism is the same as that of an eyepiece. The high-quality prism ensures high light transmission and provides high definition images.

• Good investment for long term
• One of the new comers and featured product

Xccyg 1.25 Diagonal Mirror

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The xccyg 1.25 diagonal mirror is suitable and reliable and fits well with your daily usage.

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