Canon EOS 40D
|Type||Digital Single-lens reflex|
|Sensor||22.2 x 14.8 mm CMOS|
|Maximum resolution||3888 × 2592 (10.1 megapixels)|
|Lens||Interchangeable (EF, EF-S)|
|Flash||pop-up, sync at 1/250 second|
|Shutter speed range||30 s to 1/8000 s, bulb|
|Exposure metering||TTL, full aperture, zones|
|Exposure modes||Full auto, programmed, shutter-priority, aperture priority, manual|
|Metering modes||35-area Evaluative, Partial, Spot, C/Wgt Average|
|Focus areas||9 user points (cross type)|
|Focus modes||One-shot, AI Servo, AI-Focus, Manual|
|Continuous shooting||3 or 6.5 frames/second (selectable)|
|Viewfinder||Optical / LiveView LCD|
|ASA/ISO range||100–1600 in 1/3 EV steps; 3200 expansion available|
|Custom WB||7 presets, Auto and custom 2000–10000 Kelvin, 100 K steps|
|WB bracketing||3 images, +/-9 levels|
|Rear LCD monitor||3.0 in (76 mm), 230,000 pixels (4:3)|
|Storage||CompactFlash (CF) (Type I or Type II) and Microdrive (max 32GB)|
|Battery||Li-Ion BP-511A rechargeable|
|Dimensions||145.5 x 107.8 x 73.5 mm|
|Weight||740 g (body only)|
|Optional battery packs||BP-511A, BP-514, BP-511, BP-512.
BG-E2N grip allows use of AA batteries.
The Canon EOS 40D is a 10.1-megapixel semi-professional digital single-lens reflex camera. It was initially announced on 20 August 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. 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.
Changes over the 30D include a higher-resolution sensor (10.1 megapixel instead of 8.2). The sensor also has better noise control than previous models. The 40D has a larger memory buffer so more pictures can be taken in succession without a slow down in frame rate. Frames per second has been increased from 5 to 6.5.
The camera uses the new DIGIC III image processor, which was first used in the Canon EOS-1D Mark III, introduced earlier that year. Canon’s DIGIC III processor delivers responsive operation, improved color rendering and near-instant start-up time. A new sensor cleaning system has been introduced. It can also use the Canon Wireless File Transmitter WFT-E3/E3A.
The 40D has a larger screen (3", of the same resolution) than the 30D (2.5") and 20D (1.8"). There is also a new menu for external and internal flash control, including second curtain sync.
Other additions on the Canon 40D include interchangeable focusing screens, an AF-ON button, the EOS Integrated Cleaning System for sensor dust reduction, rubber strips around the battery and CF doors for improved weather sealing and three new optional accessories: an IS version of the 18-55mm kit lens; a new backward-compatible, live view mode, and a weather-sealed battery grip.
Overview and features 
The 40D has many similar characteristics to its predecessors the 20D and 30D, but also many differences. This includes various shooting modes, ability to change ISO and white balance, a pop-up flash unit, an LCD screen of 3.0 inches (an upgrade from the previous model, the Canon EOS 30D with a screen of only 2.5 inches), and a rugged magnesium alloy protective inner-shell, which both the Canon 30D and 40D have.
The newest feature to the 40D is Live View (which the 30D, 20D, 10D, and all previous models do not have), allowing photographers to use the LCD screen as their viewfinder. It is very useful for taking pictures low to the ground, when your eye can't reach the viewfinder. The shutter noise is quieter in this mode, as well.
- 10.1 megapixel APS-C CMOS sensor
- DIGIC III processor
- 3.0 inch LCD Monitor
- 14-bit Processor
- Live View Mode
- Wide 9 point AF (all points are cross-type with the centre point having an additional f/2.8 sensitive cross-type sensor placed diagonally)
- Selectable AF and metering modes
- Built in Flash
- EOS Integrated Cleaning System
- ISO 100–1600 (3200 with custom function)
- Continuous Drive up to 6.5 frame/s (75 images (JPEG), 17 images (RAW))
- Canon EF/EF-S Lenses
- Canon EX Speedlites
- PAL/NTSC video output
- File Formats include: JPEG, RAW, sRAW (both RAW formats are 14-bit)
- RAW & JPEG simultaneous recording
- USB 2.0 computer interface
- BP-511/BP-511A or BP-512/BP-514 Battery Types (BP-511A battery supplied)
- Tough inner metal (magnesium alloy) shell
- Approx Weight 0.822 kg
Firmware and software 
Canon released its DPP 3.1 RAW converter alongside the 40D.
Initially, Adobe Lightroom did not have official support for the 40D though RAW and JPEGs from the camera did still work. Official support for the 40D as well as the 1Ds Mark III was added with Lightroom 1.3, available as a free update from Adobe.
- "Canon Camera Museum – Technology Hall – EOS 50D". Canon. 25 January 2009. Retrieved 25 January 2009.
- "Canon EOS 40D Digital SLR Camera Review". The-digital-picture.com. Retrieved 30 December 2010.
- Monday, 20 August 2007 04:13 GMT (20 August 2007). "Canon EOS 40D, previewed". Dpreview.com. Retrieved 30 December 2010.
- "Canon EOS 40D Digital Camera – Full Review". Imaging-resource.com. Retrieved 30 December 2010.
- "Compare Canon 40D and 30D". dpreview.com.
|Wikimedia Commons has media related to: Canon EOS 40D|
- Canon's Official 40D Product Page
- Canon EOS 40D Review, Phil Askey, October 2007 @ Digital Photography Review
- Steves Digicams – Canon EOS 40D – Hands on Review
|Canon EOS Digital SLR timeline (comparison)|
Specialty models: C - Cinema EOS | a - Astrophotography
Naming of Entry Level models: Rebel - Americas | Kiss - Japan