AstroZap Glass Solar Filters Size:41mm-48mm (clear aperture 38mm) 2” (51mm) to 2 ¼”

2” (51mm) to 2 ¼” (57mm)

With iOptron's StarFi you'll be wirelessly connected

you may even forget that you have an eyepiece between you and the universe

Designed for use with 400mm to 660mm focal length refractors with f/5 to f/7

• Real Carbon Fiber side plates

AstroZap Glass Solar Filters Size:41mm-48mm (clear aperture 38mm) 2” (51mm) to 2 ¼”Description The sun is a fascinating, dynamic object. Its surface is surprisingly detailed and changes frequently. The observing hours are more convenient. However, there are a few rules to follow before using your telescope on the sun. The first rule of solar observing is never point your telescope at the sun without a proper filter. The second rule of solar observing is always inspect the filter before placing it on your telescope prior to observing