Do scratches on your lens affect performance? Barely, says Lensrentals, but keep your glass protected

Many filter makers sell special protective filters for lenses, often called UV filters. Should you use a UV filter on your lens? Part of answering that question depends on what you're protecting your lens against. The primary concern photographers face is a scratch on the front of your lens. Lensrentals tested out some of its damaged lenses to see how a scratch on the front element affects image quality. It's also worth wondering how a UV filter affects image quality. Maybe a scratch makes your ...