Good afternoon, gang. I have a Nikkor 50mm f/1.8 that I've been playing with for a while for some portraiture stuff and the like. However, one of the biggest issues that I'm having with it is that sometimes I get it right, and sometimes the focus is WAY off. When I say way off, I'm not talking about "oh that's a little blurry" I'm saying that it's way off in a way that is frankly embarrassing. The shot looks clear through the view finder and then looks clear on the LCD screen. I load the photos onto my computer and they are blurry, from time to time they're actually clear, and my they are tack-sharp. Additional Information: The lens is a manual focus, I am shooting with a D5000, and I have the diopter correction on the lens to -1.0. I do wear contacts and glasses and have noticed no difference between the two as far as hit or miss. I use Photoshop Bridge, Photoshop Elements 7, and iPhoto (depending on what I am doing with the photographs). Any advice? Fixes? Just get better and don't screw it up? Thanks in advance!