How to Use a Barlow Lens with Your Telescope: 2x Guide
Learn how a Barlow lens increases telescope magnification, what the 2x factor does to your eyepiece, and how to choose the right Barlow for your observing.
3 articles
Eyepieces and Filters
Eyepieces and Filters
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Moon Filter vs Polarizing Filter for Observing the Moon
Fixed moon filter or variable polarizer? Compare transmission, colour effects and glare control to pick the right Moon filter for your telescope.
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Best Eyepiece Focal Length for a 6-Inch Reflector Telescope
Find the right eyepiece focal length for your 6-inch reflector: low, medium and high power zones, exit pupil limits and how your scope's focal length changes the