I'm looking at expanding my Lens collection. I was just wondering what I will be sacrificing if I pick up a Film lens for my Canon 30D body. I know technically focal lengths are different because of the sensor. The lens I am looking at is a 50mm f/1.4 USM Autofocus Canon | 50mm f/1.4 USM Autofocus Lens | 2515A003 | B&H Photo Would it be better for me to just one up to a digital lens, the EF-S 30mm f/2.8 USM Macro Autofocus. Canon | EF-S 60mm f/2.8 USM Macro Autofocus Lens | 0284B002 The lens will predominatly be used for street / some portraiture and a general all around prime lens.