Just be sure to get the back focus correct or you get some weird effects. They say from the flattener shoulder where the t-ring threads are it's 57mm +/- 4mm but heard people saying they have gone as far as 70mm so you might need a small spacer or two.
Quote:
Originally Posted by Boggy
Thanks for that Mark.
I wasn't sure if it had to be matched to the scope as I've never used one. The Astrotech doesn't change the focal length as well, so will be perfect.
Thanks
Barry
|