Ok. Thank you. I had purchased a 2 inch dual narrowband filter and was hoping i could find a way to use it with 135mm lens, but oh well. I reckon my lenses will just have to stick with my clip in CLS filter.
I do astrophotography. I use 2inch dual narrowband filters to cut out light pollution and moonglow. I also use CLS and quad-band filters for light pollution. While the 2inch filter can easily screw into my telescope, and most telescopes in general, I...
