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Unfiltered sunlight through a lens can cause fire
If you've ever spent hours trying to connect your camera to your telescope and manually focus on the stars at night
Never worry about focus again
Lightweight
Fits an Outer Diameter of 290-340 mm
Large Bahtinov Focus Mask for 12 inch Telescopes 290-340 mm Indoor Unfiltered sunlight through a lensShow some love for the big boys! Complete your astrophotography setup and start harvesting those sweet, beautiful photons. This lightweight focus tool is easy to attach and remove at night, and also durable enough to last even after being dropped a hundred times while blindly fumbling around in the dark. Bahtinov Focus Tool for Large Telescopes. Fits an Outer Diameter of 290 340 mm. Never worry about blurry stars again. Get perfect focus for
