I searched the Web, local libraries even the Universe to find out why Canon did not include the 'Focus Assist light(FAL)' on any of their cameras ? Even their Pro-level models ! The Focus Assist light helps the camera lock focus in very dim lighted areas. Pentax, Nikon, Fuji and other manufacturers included The FAL in their camera and they did not make a big deal about it. Actually you would never know it was there until one day while shooting, you noticed a red or green light shooting out of your camera. Canon does include the FAL in their flash units such as the 580 EX, 430EX etc. They also include it in their STE-2 off camera transmitter. This means that if you are in a very dim area, you can throw one of these on top of your camera and the Focus Assist Light coming from the flash or transmitter will help you lock focus. The problem with that, (and I'm not sure why Canon did not come up with this ?) is, suppose you want to use non-Canon strobes like in a Studio setting, or specialized flash units, then what ? Suppose you want to use non-Canon transmitters like 'Cactus', or 'Pocket Wizards' then what ? On my P/T job, I'm often asked to photograph properties where Electricity is NOT guaranteed. Even though I'm using 'L' series lenses, when the EV in the room goes down to a certain level, it is impossible to lock focus. This drives me crazy and I have to run to my car to get a pocket flash-light to help with the focusing. I can't use a Canon flash because I have a Pocket Wizard in the hot-shoe which triggers an off-camera, non-Canon Strobe. I searched the web, but there are no other alternatives other than a flash-light. What was Canon thinking ?