Specification Camera: 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 August 2007. It is the successor of the Canon EOS 30D and can accept EF and EF-S lenses, and like its predecessor, it uses an APS-C sized image sensor, resulting in a 1.6x field of view crop factor.

Improvements
Changes over the Canon EOS 30D include a higher-resolution sensor that retains the same dimensions and 1.6 crop factor relative to full-frame 35mm format. While the sensor is based on that of the consumer grade Canon EOS 400D, improved microlenses are employed to keep noise to levels at least as low as the 30D and much lower than the 400D. The LCD rear screen size is increased to 3.0 inches from 2.5 inches. Other changes include a larger 17 frame RAW / 75 frame JPEG buffer, and slightly faster 59 ms shutter lag, with a maximum frame rate of 6.5 frames/second (up from 5). The 40D uses the same diamond layout of nine autofocus points as the 30D and 20D, but has a AF sensor with nine cross-type points (up from one).

The 40D can record in three formats, JPEG (of various quality settings), RAW and Canon's sRAW format which reduces images size to 2.5 megapixels. Because of the 40D's faster DiG!C III image processor, both RAW formats record 14bit colour (over 16 000 colour variations per channel) vs the 30D's 12bit colour which could only record 4096 per channel[1]. The viewfinder magnification has been increased by approximately 5% over that of the 30D. In addition, the viewfinder has been modified to display the current ISO setting and alert the user when shooting in black & white mode.

The EOS 40D also uses the DiG!C III image processor first introduced to the EOS line with the Canon EOS-1D Mark III. Other similar technological improvements drawn from the 1D Mark III and 1Ds Mark III include live preview with manual focusing and the EOS integrated cleaning system introduced on the 400D (Rebel XTi). Software bundles with the 40D allow direct control of the camera in live view mode from a computer connected via USB, with control of camera functions and on screen preview. This functionality is targeted at studio work and astrophotography.

Features new to the semi-professional model include weather and dust-resistant sealing of the battery door and storage compartment (more than the 5D offers but far less than that of the 1 series), automatic ISO selection, two features that the Nikon D200 also has. Interchangeable focusing screens are introduced with 4 different optional models currently available.

The EOS 40D can accept the Canon Wireless File Transmitter WFT-E3/E3A for fast file transfer to a remote file server, either through an ethernet cable or a Wi-Fi network. This capability expands the EOS 40D's range of applications to sports and studio set ups where real-time transfer of the images is crucial.

Read Full review of CANON EOS 40D at
- http://en.wikipedia.org/wiki/Canon_EOS_40D
- http://www.dpreview.com/reviews/canoneos40d/

Video of Canon EOS 40D

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