Quote Originally Posted by codyjgraham View Post
that makes sense! what does coated vs uncoated mean?
Old lenses had no coating on them. Later lens manufacturers put a coating on the lens glass to reduce flare. We call this single coating. Eventually this led to multi coating the glass to further reduce flare.

Single coated lenses and non coated lenses are not bad. You just have to take more care that they are shielded from the sun or studio lights. It's good advice to always use a lens shade no matter what lens you use unless of coarse you desire lens flare.