Unlike the 1D series cameras, the Canon EOS 7D does not have a built-in power grip. Just like Canon's other mid-level DSLRs, the 7D takes an accessory power grip (the BG-E7), a $219.95 add on that does much to improve the camera's ergonomics. For some reason, Canon decided to put the 7D's power switch on the camera's top deck upper left, a completely new location, which confuses those of us used to the 1D and xxD series cameras. The camera takes the same BP-511 batteries that the xxD and Digital Rebel cameras. It comes with a single battery charger. Using the BG-E7 power grip makes it possible to use two batteries.
The 7D boasts a 19-point autofocusing system with each point being the more sensitive cross section type. This is a superior AF sensor since it's capable of autofocusing equally well no matter which way the camera is oriented, horizontally or vertically. These sensors are at their best with 2.8 or larger maximum aperture lenses. Since the camera using an APS-C sized sensor, it effectively provides a 1.6x multiplier effect. Like many of Canon's more recent DSLRs it features a self-cleaning sensor that activates when the camera is turned on or off.
The camera's built-in wireless flash controller is used through the camera's built-in pop-up flash. The user can use the pop-up flash with wireless flash, without wireless flash (obviously) and can be turned off and just used for wireless control. The pop-up flash can be used in ratio mode with wireless flash or as part of the B and C groups. If the wireless flash units are set to different groups (A,B,C) the controller can adjust power ratios from 1:1 all the way to 8:1 or 1:8 in 1/3 stop increments. The camera can control as many as four flash units in each of the three groups.
The camera takes type I and II compact flash cards and UDMA compliant cards only.
According to Canon's website, the camera offers the following resolution settings:
- Large: Approx. 17.90 Megapixels (5,184 x 3,456)
- Medium: Approx. 8.00 Megapixels (3,456 x 2,304)
- Small: Approx. 4.50 Megapixels (2,592 x 1,728)
- RAW: Approx. 17.90 Megapixels (5,184 x 3,456)
- M-RAW: Approx. 10.10 Megapixels (3,888 x 2,592)
- S-RAW: Approx. 4.50 Megapixels (2,592 x 1,728)