This is not an f2 lens. Open all the way to f2 and you'll wonder if you miss focusing because it's so soft at this aperture. It's really more than f2.8 or 3.5. FYI I don't like this lens and I have it.
π· Nikon AF-S NIKKOR 50mm f/1.4G Lens with Auto Focus: Perfect for Nikon DSLR Cameras
76 Review
Canon EF 50mm f/1.8 II Fixed Lens - Discontinued by Manufacturer
93 Review
Canon EOS SLR Camera Lens EF 24-105mm f/4 L IS USM
124 Review
New Nikon 18-105mm Vibration Reduction π· Zoom Lens with Auto Focus for Nikon DSLRs
104 Review