I am about to buy a Borg 76ED which I plan to use for my astrophotography:
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:
Any success with third party reducers? Maybe even the simple Astro Tech 0.8x reducer/flattener?
Thanks so much for your input!
Edited by Martin A Cohen, 03 December 2019 - 01:51 AM.