Yes, that is true for all reflector scopes. But if you want to put any sort of lense (like a reducer or something else) into the pathway of the light, i would recommend an IR/UV-cut filter.
Hello all you lunar imaging GURU’s! I have seen some of the incredible lunar images here on AB and obviously with excellent processing techniques there seems to be on thing in common. IR Pass filters to be specific. In doing some reading on what filt...
Discusses IR-pass filters relevant to reflector telescope optical systems.
RASA telescopes, Hyperstar systems and other fast optics is growing quickly in popularity among astro photographers. However popular, these systems requires costly, special narrowband filters with shifted band-pass, and finding good such filters is n...
Addresses filter selection for optical systems, potentially covering reflector considerations.