Quote:
Originally Posted by Dindsy
Nothing like a challenge 
So, is the answer to use Prime focus method? Cos I tried that and all i see is fuzz. Like looking throught the viewfinder without a lens on.
For this set up I use the same adapter but without the eyepiece. Is the camera too far away in this instance? Do I need a shorter camera adapter to bring the camera right up to the focuser?
BTW my set up is: 6" Newtonian, f=1000mm, EQ3 mount with RA drive.
cheers |
I think the answer is probably yes - do not use the long adapter. I have never used a Newtonian, but I understand that they do not have the large range of inward focus travel that SCTs and refractors have. This is known as insufficient back focus.
Typically, people mount the DSLR directly to the focuser with a low profile adapter and then have to wind the focuser almost all the way in. Some have even modified their ‘scopes by moving the prime mirror a little further up the tube, so the prime focus or point of focus extends sufficiently far outside the focus tube.
Cheers
Dennis