I went out today with another board member here to do some shooting... with two different types of tools that shoot. I wanted to get some shots of firearms cycling. With a machinegun, this is relatively easy. Just hold the trigger back and hold the shutter down. The speed of the continuous mode on your camera doesn't really matter as you'll get some brass mid-air no matter how slow it is. Example: With a single shot handgun it's a lot harder. You have to have the shooter fire pretty quickly and with my 1D firing shots at 10fps I might get one shot of the pistol with the slide open and a spent cartridge in the air out of 20 pictures. Here's a shot of what I was trying to capture. I got a number of really cool shots, but some were not quite in focus because I was using "single shot" mode. Here's where the AI-Servo AF system of the 1D really comes into play. I was shooting these at f/4 and ISO 1600 with a shutter speed in the 1/1250 range. The guns move when shot, and at f/4 what was in focus before the firing cycle began will likely not be in focus once it starts as the whole firearm moves rearward quite a bit and VERY quickly. The 1D owned it. I really do love that camera. Anyway, I hope you guys enjoy the pics.