Im currently using a Baader UV/IR Cut-Filter before a Quark, 127mm ES APO. Everything seems fine. However i have noticed that the a lot of heat still passes thru the filter. I know the Quark can handle the heat, its the UV im mainly hoping to reduce as thats bad for our eyes.
I did some reading and i read that a supplier discovered the Baader UV/IR Cut-Filter was actually poor at reducing the heat, and that they discovered the Baader H-alpha 35nm CCD Filter does a much better job. Looking at the photos of the filter it looks extremely red! I assume this would greatly change the look of the sun?
Has anyone has experience using the 33nm filter in Quark for visual?
I am thinking 2in 35nm filter before the Quark, and one 1.25in Baader UV-IR Blocker on the barrel of the eyepiece would provide max protection outside of having a full external ERF?