When selecting RGB filters, ensure they physically fit your camera and telescope setup. Filters that are too thick or large can cause vignetting (dark corners) or focus shifts.
Look for filters with anti-reflective coatings to improve light transmission and reduce reflections. Also, check if your filter wheel or holder supports the filter size and thickness you plan to use.
Choosing compatible filters helps maintain sharpness and color fidelity in your astrophotography.
