|
I found an MPCC gave me some extra back focus on my 12 inch, it appears its not enough for you though.
other alternatives are.
1. A low profile focuser, ..... Somewhat problematic I found due to less support in the mechanism led to heavy cameras pitching and becoming off axis.
2. Cutting the tube and relocating the mirror further up the tube, by an amount that you can buy as an extender ( I think I ended up doing a 50 mm cut)
|