Canon's press material for the EOS 5D states that it 'defines (a) new D-SLR category', while we're not typically too concerned with marketing talk this particular statement is clearly pretty accurate. The EOS 5D is unlike any previous digital SLR in that it combines a full-frame (35 mm sized) high resolution sensor (12.8 megapixels) with a relatively compact body (slightly larger than the EOS 20D, although in your hand it feels noticeably 'chunkier'). The EOS 5D is aimed to slot in between the EOS 20D and the EOS-1D professional digital SLR's, an important difference when compared to the latter is that the EOS 5D doesn't have any environmental seals. While Canon don't specifically refer to the EOS 5D as a 'professional' digital SLR it will have obvious appeal to professionals who want a high quality digital SLR in a body lighter than the EOS-1D. It will also no doubt appeal to current EOS 20D owners (although lets hope they've not bought too many EF-S lenses...) äë..
Engineered with pro-level features and performance, the 12.3-effective-megapixel D300 combines brand new technologies with advanced features inherited from Nikon's newly announced D3 professional digital SLR camera to offer serious photographers remarkable performance combined with agility.
Similar to the D3, the D300 features Nikon's exclusive EXPEED Image Processing System that is central to driving the speed and processing power needed for many of the camera's new features. The D300 features a new 51-point autofocus system with Nikon's 3D Focus Tracking feature and two new LiveView shooting modes that allow users to frame a photograph using the camera's high-resolution LCD monitor. The D300 shares a similar Scene Recognition System as is found in the D3; it promises to greatly enhance the accuracy of autofocus, autoexposure, and auto white balance by recognizing the subject or scene being photographed and applying this information to the calculations for t..