Kase Bright Star Professional Bahtinov Filter Focus Threaded Filter 77mm/82mm Size:82mm aim your lens or telescope

aim your lens or telescope at a bright star and manually adjust the focus of your lens or telescope until it looks close to focus

Printed in the USA

even in the dark

Removing the mask won't bump your polar alignment

Before attaching the device

Kase Bright Star Professional Bahtinov Filter Focus Threaded Filter 77mm/82mm Size:82mm aim your lens or telescopeLaser Precise Focus at night Don't miss another clear night. Get perfect focus every time with a laser etched Threaded Bahtinov Filter for your camera lens. If you've ever spent hours trying to manually focus your camera on the stars at night, you know the struggle. A bahtinov mask will cut your setup time down to mere minutes with ease. Kase Bright Star Get perfect focus on the stars and planets with a laser etched batinov mask. Shockproof tempered