Large Bahtinov Focus Mask for 12 inch Telescopes 290-340 mm Indoor but once they're imported to

but once they're imported to the computer

Lightweight

If you've ever spent hours trying to connect your camera to your telescope and manually focus on the stars at night

Fits an Outer Diameter of 290-340 mm

Check out my 10 easy steps here: Using your bathinov mask

Large Bahtinov Focus Mask for 12 inch Telescopes 290-340 mm Indoor but once they're imported toShow 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