I took out my new refractor on Friday night, I added the diagonal and plopped in my EP, but there isn't enough out travel in the focuser for the OTA to come into focus. Is it reasonable for a refractor to need an extension in order for it to come to focus? It seems odd that any manufacturer would design a scope that does this. Is there any productive reason why a scope would do this?
Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts.