The balance of the points (26) are horizontal line-sensitive assist AF points - able to be used in conjunction with the selectable points or when all points are active. You now can manually select only 19 of these AF points, but they are all high-precision, cross-type points To use HTP (Highlight Tone Priority), an ISO setting of at least 200 must be selected (which is displayed as 2oo when HTP is enabled). Dust Delete Data - Data from a test shot is used to 'map' dust spots and can be later removed using Canon DPP Software

Although the level of noise in JPEGs captured by the Canon camera at ISO 102,400 with the noise reduction set to its default level is lower than that in JPEGs from the D3S, the EOS-1D Mark IV’s files contain much less detail. New drive design. If the electrical engineers had a hard time boosting the electrical and computational throughput of the Mark III, that was nothing compared to what the mechanical guys (and gals, presumably) had to do to get the mirror to slam up and down fast enough without destroying itself or the camera, and to get the shutter to be able to fire and reset fast enough. It'd take a lot more than the paragraph or so we have here to describe all they did, but their approach had three main elements: Evaluative metering (linked to all AF points), Partial metering (approx. 13.5% of screen, at center), Spot metering (approx. 3.8% of screen), Centerweighted average meteringThe 1D3, along with an impressive range of available lenses and accessories, is an especially appealing body for sports, photojournalism, wildlife, weddings and other low light photography. Better yet, get the new WFT-E2A Dedicated Wireless File Transmitter and control the camera wirelessly. Only Canon ever gave me the exact thing that I see with my eyes into a file. This could not be stated more boldly. Nobody else does that. On the other hand, the 1D III's extremely fast One Shot AF has been extremely accurate - under nearly all circumstances including the ones problematic for AI Servo. New 45-point Area AF sensor with 19 high-precision, cross-type points (f/2.8 compatible), 26 standard-precision Assist AF points

The remainder of changes in the Canon 1D Mark IV's autofocusing system are to be found in the camera's firmware -- specifically, the focusing algorithms, and the custom functions that let photographers tune the camera to their own specific needs. In reality, it is ready to go in a fraction of a second - you just need to press a button to bypass the cleaning (all Canon DSLRs are shot-priority). Shown above are two of the image review/information screens that make good use of the 1D Mark III's new LCD real estate.New control: Both the Multi-Controller and the Set button are new interface twists that make the 1D Mark III more usable than past Canon Pro offerings. Then shoot a test shot from a -20 setting to a +20 setting using increments of 5 between each shot.

remaining capacity (as 6-level icon and in 1% numeric increments), shutter count, and recharge performance (3 levels).

Well, I’ll be damned –I received a free Canon 1D Mark IV (when purchasing a 300mm f/2.8 L USM Canon ;). However, when shooting a football match with a team in white against a team in mid-green, I noticed that the exposure varied depending upon what colour shirt the active AF point was over. The RAW files were processed to 16-bit TIFF files, imported into Photoshop and output as a JPG using "Save For Web" at a quality setting of 80.