|
Have you tried with a barlow lens / powermate?
My 10" GSO dob doesn't reach focus with a DSLR, but it does with a barlow. And I'd say you will almost certainly be wanting to use some kind of focal extender for planetary so it might be worth trying that before you start on the surgery.
The other thing that is usually recommended is trying to extend your collimation bolts as far as they will go to bring the mirror further up the tube, and also consider a low profile focuser. It all depends how far out you are from reaching focus though.
|