Hi, I was looking at getting the Baader 2" filters and I bumped into 2 versions:
1. For the fastar high speed rasa devices (https://www.bhphotov...d.html/overview)
2. For regular ones
My question is if I get the high speed ones would they suffer on a slower refractor like on an f/4 or f/5 kind of devices or are these meant *only* to be used on the f/2 to f/3 fast devices?