Quote:
Originally Posted by Joshua Bunn
I think it would be interesting to see some tests done with and without AO. I do realize it can be tedious to pull gear apart, more to the point, put it back together, especially when it was all shimmed and square before hand  |
More to the point the guessing game on back focus I have had to do with this scope and flattener. The scope specs on back focus is not great. It took some time to get data from GSO on distances etc and then it took sometime to narrow down the problems. Nor has the back focus on the flattener been good too, I am not convinced that the flattener actually works either. I have tried four distances and the latest one is about the closest to correction as possible with still some field curvature in the corners.
So what is another adapter (god damn so many of them that I think I know have more than 10 of them) and pull apart and put back together again. In terms of shims, my new camera only had one shim in one corner, so that has made things quite simple.