#5. "RE: What was that 'THUMP' in the middle of the night?" In response to In response to 4
Filters save. Obviously, cheap no-name filters may or may not cause deterioration to the image. But Nikon, B+H and other top quality filters don't cause MUCH quality loss. If you shoot a lot of brick walls and test charts you may disagree, but they protect glass and reinforce filter rings.