I purchased an Astro-Tech 1.25" diagonal to use on my Meade 125 Mak. I have a 2" dia. x 2" long visual back with a 2" to 1.25" adapter to mount the diagonal. I was using a old/cheap diagonal that work's with all my eyepieces on this scope, but the new Astro-Tech seems to be larger/further back and won't allow me to attain focus on anything in the sky.
Does anyone know if they make a shorter visual back (maybe 1.5") to pull my diagonal closer to the scope to allow me to attain focus?
If I'm doing something wrong please let me know. Any advice would be appreciated.
Thanks for looking