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[Martin A Cohen]

I am about to buy a Borg 76ED which I plan to use for my astrophotography:

 

http://astro.martinc...hotography.com/

 

It is optically the same scope as the 77ED if my information is correct. I would like to image at F/5 or F/5.6 instead of the native F/6.6 and I am looking for a good reducer. I will be using a full frame DSLR as well as a ZWO ASI071 cooled one shot color camera, so a large imaging circle is important.

 

The dedicated Borg 0.85x reducer (part # 7887) has been discontinued and is almost impossible to find and the F/4 super reducer (part #7704) is also pretty rare and quite expensive:

 

https://www.hutech.com/redtelecon.htm

 

Any success with third party reducers? Maybe even the simple Astro Tech 0.8x reducer/flattener?

 

Thanks so much for your input!

 

Martin

Edited by Martin A Cohen, 03 December 2019 - 01:51 AM.