|
Hi Michelle,
Firstly, I dont know what scope you have, but for this I am assuming its a Skywatcher 8" dob? (based on your comments on my beginner's package thread?)
My 1000D on my Skywatcher 8" has no trouble when the T ring is connected to the 1.25" adaptor (by unscrewing the 1.25" barrel and threading the remaining part of the focuser adaptor into the T ring.
If you have purchased a 2 inch adaptor, then I assume it is being inserted into the 2" eyepiece adaptor and then you will have a problem as the Skywatcher 2" adaptor is TOO LONG and the DSLR wont reach focus (by a smidgen).
Now, if you have a collapsible truss dob then you can try sliding the truss DOWN toward the primary by "a little bit" lock the truss tube screws and then try again. This effectively brings the primary UP the tube as you are lowering the secondary cage towards it.
Second, if the first idea doesnt apply (no truss tube) you can try winding the Primary screws OUT so the mirror is pushed away from the bottom of the tube (loosening) and this will bring the primary closer to the secondary and hopefully within grasp of the DSLR focus point. Dont wind them all the way out as the screws will drop off the primary and a bit of a bugger to get back on easily. One thing I found with my 8" tube is that the primary was ALL the way at the bottom of the tube when I unboxed it, causing all sorts of collimation issues. Check this....see if it works.
Finally, as Adam mentioned, you can replace the primary screws and springs with longer ones, but this may lead to you needing an extension tube on the 1.25" eyepieces to reach focus.....
Low profile focusers help also.
Hope you can find the best solution for you, give the suggestions above a go...
Cheers
Chris
|