ABOUT CANON EOS 40D
The Canon EOS 40D is a 10.1-megapixel semi-professional digital single-lens reflex camera. It was initially announced on August 20, 2007 and was released at the end of that month. It is the successor of the Canon EOS 30D, and is succeeded by the EOS 50D.[1] It can accept EF and EF-S lenses. Like its predecessor, it uses an APS-C sized image sensor, resulting in a 1.6x field of view crop factor.
OVERVIEW AND FEATURES
The 40D has many similar characteristics to its predecessors the 20D and 30D. This includes various shooting modes, ability to change ISO and white balance, a pop-up flash unit, and an LCD screen. The LCD screen is larger than the previous models (3.0" from 2.5" previously).
The 40D has more megapixels, and the resolution sizes are slightly higher than the 20D and 30D. Its RAW format is 14-bit.
A new feature is Live View, which allows photographers to use the LCD screen as the viewfinder. The shutter noise is quieter in this mode.