Bahtinov masks are versatile but not one-size-fits-all. They work best on telescopes with clear, round apertures like refractors and Newtonian reflectors.
Catadioptric scopes with corrector plates or unusual aperture shapes might need custom masks to produce accurate diffraction spikes.
Always measure your telescope’s front diameter carefully before buying. Adjustable or DIY masks can cover multiple scopes, making them ideal if you own several telescopes.
