ASI174MM Cooled focus issue

mueting

Ok, here's my situation. I have an Edge HD 11". If I use the .7x reducer, a T- adapter, a zwo filter wheel (with no tail piece), and then thread the short end of the adapter with the brass compression ring. The long thread side into my asi174mm. That way I can reach my 5.75 inch back focal length. Problem is I can't rotate the camera if I want to. What can I do to resolve this if possible? If shooting dso's I would want the wider field with the reducer, yes? Thanks please advise.

einari

That is a problem if you want to use filter and a reducer with limited backfocus.

There are these rotators but they add about 5mm to imaging train:

http://www.teleskop-express.de/shop/product_info.php/language/en/info/p7356_TS-T2-360--rotator---only-5-5mm-back-focus.html

http://www.teleskop-express.de/shop/product_info.php/language/en/info/p5547_TS-T2-Thread-360--Rotation-and-Quick-Changer---5-5mm-short.html