Ever struggled to get your telescope perfectly focused? The Bahtinov mask is here to change that. Invented in 2005, it’s a flat mask with a special pattern that fits over your telescope’s front aperture.
When you point your scope at a bright star, the mask creates three sharp diffraction spikes. As you adjust focus, the central spike moves relative to the others. When it’s exactly centered, your focus is spot on.
This simple visual cue saves you time and guesswork, making it a must-have for anyone serious about crisp astrophotography or clear visual observing.
