Canon EF 50mm f / 1.4 USM lens (58mm filter thread) (Camera)
A must for every photo backpack. I am very spoiled by my L lenses eg 100mm 2.8 L IS USM, 70-200mm 2.8 L IS USM II. The 50mm can keep up from Aperture 2.8, really deep focus, it is then from 5.6 to Aperture 11th Aperture 1.4 makes no sense, the center