Should I choose the objective lens cover matching the actual size of the objective lens? For example, 40mm scope cover for 40mm objective lens?
How about the eye lens? How to choose the right size for it? Or I don't need one to cover the eye piece?
Y
Thanks a lot.
How about the eye lens? How to choose the right size for it? Or I don't need one to cover the eye piece?
Y
Thanks a lot.




















































