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How can I hook up my Standard Celestron 9.25 inch to a Canon mirrorless camera?


jakimo

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Hi,

I just bought a Canon EOS R5 camera, and I want to hook it up with my brand new Celestron 9,25 (regular, NOT Edge) avx. What kind of adapter do I need for that purpose? The guys at Telescope Adapters.com want to sell me this set up :

https://www.telescopeadapters.com/img/cms/TRUE-2_DIAGRAM_700W.jpg

will it work? Does my SCT tube accept 2 inch eyepieces/accessories???

Please help!

Best regards,

Jacques Goguen

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One of the reasons that the Seller at TelescopeAccessories.com is suggesting the "True 2" Adapter is because your R5 is a Full-Frame Sensor. The diagonal Size of a Full-Frame Sensor is 43mm.  The

Jacques, I believe that all you need are a T-adapter and a Canon T-ring The T-adapter attaches to the visual back of the C 9.25 optical tube, the T-ring screws onto the end of the T-ada

Jacque, I re-read your post and saw that you had also asked about using 2" eyepieces. In order to use your SCT with 2" eyepieces you need to purchase a 2" diagonal to replace the 1.25" diago

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One of the reasons that the Seller at TelescopeAccessories.com is suggesting the "True 2" Adapter is because your R5 is a Full-Frame Sensor.

The diagonal Size of a Full-Frame Sensor is 43mm.  The Clear/Inside Aperture of a standard T-Adapter is only about 36-40mm, meaning that you will experience a good bit of Vignetting in the Corners of your Images.  The Clear/Inside Aperture of a "True 2 Ultra-wide Adapter" is almost 48mm - no Vignetting.  However, with the "True 2", you will need to add a 2" SCT Visual Back such as:  https://www.bhphotovideo.com/c/product/1512119-REG/celestron_93661_sct_to_2_visual.html  or  https://agenaastro.com/blue-fireball-2-sct-visual-back-sct-2-adapter.html (I suggest the latter as it has a better 2-thumbscrew Brass Compression Ring).

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