I'm in need of a new lens for my D40, and I've been strongly considering Nikon's 50mm f1.8 prime lens. I've heard nothing but good things about it, and it's quite well priced. I enjoy portraits and the like, so the loss of a wide-angle lens does not concern me much, but I am concerned that on the D40, the 50mm will give me too much zoom - I read that on the smaller sensor it's actually equivalent to a 75mm lens. Has anyone out there used the prime as their primary lens? I'm really attracted by the photo quality and the speed, but before I spend the money, I'd like some feedback on whether it's too much zoom on a small-sensor camera. I'd love an 18-200mm, but they're more costly than what I can afford atm.