Kase Bright Star Professional Bahtinov Filter Focus Threaded Filter 77mm/82mm Size:82mm Gently attach the mask to

Gently attach the mask to diffract light into three spikes

gently attach the bahtinov mask

Includes Storage Case to help you stay organized

Removing the mask won't bump your polar alignment

Kase Bright Star Professional Bahtinov Filter Focus Threaded Filter 77mm/82mm Size:82mm Gently attach the mask toLaser 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