How to determine if set up is ok for 1.25" filters.

[John999R]

How would you determine if your set up will work with 1.25" LRGB or narrowband filters? Is there a formula and is OTA aperture a major factor or is it camera sensor size or both?

I've been using a 2" imaging filter with my crop sensor 60Da. 2" filter just seems like the appropriate diameter filter, but would a 1.25" filter work?

[STEVE333]

Hi John - Don't know if this will help you or not. The link below is to a calculator that is used to determine the required filter size for CCD (or CMOS) cameras. You may be able to put in your camera as a "Custom" camera. Hope it helps.

https://astronomy.tools/calculators/ccd_filter_size

Steve

[John999R]

Thanks, Steve, exactly what I was looking for, bookmarked!