Canon EOS 40D

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All new Canon SLRs from the XTi on include the EOS Integrated Cleaning System.   Not only does the system shake dust from the low-pass filter, but the camera has been designed to shed less dust from its internal parts, so that the camera's creating less dust of its own.

You can also clean the sensor yourself (as you'll inevitably need to do regardless of any built-in anti-dust system as of this date); but if you've found dust in your images and have no time to do a full manual cleaning, you can map the dust for later removal on a computer with Canon's Digital Photo Professional software, bundled with the camera.

The Canon EOS 40D uses the same BP-511A that the EOS 30D uses, and is compatible with the BP-511 and BP-512.    The DIGIC III processor is said to offer lower power usage, but that's likely taken up by other functions, like the bigger and brighter 3.0-inch LCD display.    The 40D is expected to capture around 1,100 shots with the BP-511A, just like the 30D; reduced to around 800 shots at freezing temperatures.

Comment
  • We find it not so effective when AF assist lamp only works in flash-on mode, making available light photography more difficult (somewhat offset by the improved AF sensor)
  • Indoor white balance is a little yellow and Battery capacity is reduced from the larger screen and dust off system - but again you can always go for an external Battery Grip (BG-E2N)
  • AI Servo autofocus mode is not reliable and sometimes we noticed that Auto-focus sometimes just seeks and seeks or was it lost
  • funny but it seems that Higher sensitivity AF system works better in low light
  • Picture Styles makes choosing and customizing color modes fast and easy
  • Compatible with over 50 lenses and accessories, for me is so far the Best part i like, which means i can still use my existing Sigma lenses for My EOS 1000D as well too
This is a very flexible and wonderful Digital SLR camera to work with and I like the features and improvements the Canon 40D have to offer, indeed it is one of My Dream dSLR camera.

My Friend have told me that Canon 50D is even more Impressive.
Specification
  • Resolution : 10.10 Megapixels
  • Kit Lens : n/a
  • Viewfinder : Optical / LCD
  • LCD Size : 3.0 inch
  • ISO : 100-3200
  • Shutter : 30-1/8000
  • Max Aperture : n/a
  • Memory Type : CF1 / CF2 / Microdrive
  • Battery : Custom LiIon
  • Dimensions : 5.7x4.3x2.9in (146x108x74mm)
  • Power-on Time 0.4 sec
  • Shutter Lag, Full Autofocus 0.128 sec
  • Shutter Lag, Prefocused 0.061 sec
  • Shot to Shot time 0.28 sec
  • Continuous Speed 6.40 fps (No limit)
  • Viewfinder accuracy (Optical) 101%
  • Viewfinder accuracy (LCD) 95%
  • Battery Life (CIPA standard) 800 shots
  • Highlight detail is well preserved at default settings and Highlight Tone Priority makes it even better
  • Images are sharp, but not over-sharpened, and noise suppression is kept well under control
  • Color is very accurate, with only red being a little off, which consumers generally like very much and Auto white balance handles most situations very well
  • Live View works from computer via cable or WiFi (with adapter) and more useful features that you may need to find out yourself