Quote Originally Posted by francongphotography View Post
But I had to say, these square filters are really convenient...as I just need to buy different thread sizes for my lenses and screw on the filter holder and be ready for the shot. Saving loads of money from buying different sizes of circular filters for my lenses.
One of the problems with the square (or rectangular) filters and holder is you can not use your lens hood which can be a problem with glare, and I like the front element protection the hood provides. However, I do use them for the grad ND's, but nothing else.