Yep - the 2 inch replaces the 1.25. nosepiece
I actually bought the 2" to see if i could get the DSLR closer to the secondary for prime focus, because the stock barrel adapter on the scope adds about 1cm...
unfortunately it didn't help....
you don't use the projector for prime focus at all -
you connect the nosepiece straight to the t-ring....but it is still too long.
(I am not going to move my primary - too much like hard work)
As long as the EP physically fits inside the projector, and
with the 2" in place - an EP - or as suggested earlier, a barlow,
will effectively move to "inside" the focusser....so gets much closer
to the secondary....
Will post some pics later this evening to illustrate what i mean....
Quote:
Originally Posted by CJ
Hi Sharkbite. Hmm, interesting indeed.
Do you unscrew the 1.25" nosepiece from the projector and screw in the 2" camera adapter instead?
That would have the same effect as moving the mirror wouldn't it. It does seem, as many IIS posters have discovered, that you need to get closer, or use a Barlow to put the focal point further out from the focuser.
Do you think it's due to the extra length of the projector that you cant get close enough for prime focus? That seems to make sense to my sketchy grasp of what's happening with this approach.
Cheers
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