W war3 New Member Jan 11, 2004 141 0 0 Apr 6, 2005 #1 if i use a none-slim col on 20mm lense, will it cause dark angle? Thanks!
S StreetShooter Senior Member Jan 17, 2002 4,634 0 36 Katong streetshooter.clubsnap.org Apr 6, 2005 #2 If you are using DSLR, no need. If you are using film SLR, yes, advisable to prevent vignetting.