none... leave your lens hood on to protect your lens, the more glass you add the more you reduce the quality of your lens
-1.....not when you use high quality filter. With B&W Clear, I don't see the effect in my photos.
I agree with you...to all the goys that are saying no filter..when I get my lens I will shoot two raw files off a tripod..one with a B&W MRC filter and one without...and you have to tell me which is which...doubtful that anyone could. truly...
5D Mark III, Canon 15mm f/2.8 Fisheye, Canon 16-35mm f/2.8L II, 21mm f/2.8 Zeiss, Sigma 35mm f/1.4, 24-70mm f/2.8 II, 50mm f/1.4 Sigma, 85mm f/1.2L, 100mm f/2.8L Macro,70-200mm f/2.8L IS II...1.4x converter III, and some other stuff!