When I was shooting with a 50D crop, I utilized glass; now I use it with a 5DMK2. There are times when you want the background to be blurred, but miracles don't happen. The aperture is 2.8, but it's short on FF; after cropping, I don't even have 105:)
Nikon 35mm f/1.8G Auto Focus Lens for Nikon DSLR Cameras - Black (Model 2183)
125 Review
Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002
78 Review
Nikon 50mm f/1.8D Lens: Perfect for Nikon DSLR Cameras!
97 Review
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review