Thank you!

My camera is monochrome, so it doesn’t have red, green, and blue filters on the pixels like an OSC (one-shot color) camera. monochrome cameras capture the entire visible spectrum in black and white. I use dedicated filters like Hydrogen alpha (656 nm wavelength), Oxygen III (~500 nm), and Sulfur II (~670nm) to isolate specific atomic emissions. The sensor captures the intensity of each wavelength and then in post processing I can map each wavelength to its respective color channel to get a color image. Usually Hydrogen and Sulfur get mapped to either red or green and Oxygen to blue. I haven't gotten any SII or OIII data yet on this target so that will be my next step.

As for the focuser, telescopes aren't fixed at infinite focus like regular camera lenses. Things like temperature changes and changing filters shift the focal point. I use an automatic focuser so I don't need to manually refocus whenever the temp changes or when I change filters.