So I got the battery grip for my D80 yesterday, and made some changes to the camera settings... Holy shit! Go into your menu, and in the custom settings menu, number 18 - AE-L/AF-L. This is the button in between the viewfinder and the rear dial. Change that to AF-ON/AF Area. This does a bunch of really fucking cool things, but as a warning, it's a complete change of how you shoot, so go practice. First, this disables the half press auto focus. The shutter button now ONLY fires the shutter. Ever miss a shot because the camera wouldn't shoot until it got in focus? No more. Sure, your shot might be oof, but it'll fire. Secondly, this turns the ae-l button into your focus button. This is awesome for a couple reasons: 1. It gives you the best of AF-S and AF-C. You want to focus on a single object then compose? Press the button to focus on your object then release, and you can freely fire the shutter without the camera refocusing on the half-press. You want continous focus? Hold the button down to keep focusing on your selected focus area, and press the shutter as desired. 2. You can change your focus area WHILE continously focusing! If you hold the button, then rotate the front dial, your camera will change the focus area AND immedietly focus on that. So if you're shooting something but decide you want that object in a different part of the frame, you can re-select your focus area and get immediete focus on that area, all without removing your eye from the viewfinder! I know this post is way to fucking long, but I LOVE this change. Try it out.