Photo Features As far as shooting features go, the EOS-1d works just like the EOS-1v film camera. The control layout is identical. Camera settings are made via buttons and two dials, the Main Dial atop the body just behind the shutter button, and the Quick Control Dial on the camera back. An LCD panel to the right of the finder keeps you apprised as to what's what, just like on the film camera. To set the exposure mode, press the Mode button and rotate the Main Dial until the desired symbol appears on the LCD panel: P for shiftable program AE, Av for aperture-priority AE, Tv for shutter-priority AE, M for metered manual, DEP for Canon's trademark depth-of-field AE, and bulb for long exposures. Once the shooting mode has been set, the Main dial sets shutter speeds (in Tv and M modes), apertures (in Av and bulb modes), or Program Shift (in P mode), while the Quick Control Dial sets apertures (in M and bulb modes) or exposure compensation (in P, Tv, Av and DEP modes). Focusing The EOS-1d shares the EOS-1v's excellent AF system, including a 45-point CMOS AF sensor that covers an 8x15mm elliptical area in the center of the image area, including seven cross-type points down the middle. The system is quick and accurate in light levels from EV 0-18, and can keep up with the camera's maximum 8-fps shooting rate. In dim light, the AF-assist beam in Canon EOS Speedlite flash units or the ST-E2 transmitter will automatically fire; you can use Personal Function 15 to disable the AF-assist beam. When set for One Shot AF, the camera utilizes all 45 points, focusing on the closest subject that falls under one of the points. You can "register" one of the points as your "home position," switching to it at the touch of a button. You can also select any of the 45 points yourself, set the camera to use only 11 or 9 of the 45 points (for faster manual selection), or use Custom Function 17 to expand the AF area from a single manually selected point to that point plus 6 or 12 adjacent points. There are two AF modes: One Shot for still subjects, and AI Servo for moving subjects. If the subject moves toward or away from the camera at a constant rate, predictive AF calculates the subject's position at the instant of exposure and sets focus accordingly. When the camera is set for AI Servo AF with automatic focusing-point selection, the camera will use the center AF point to establish focus, then automatically track the subject as it moves to another AF point. You can use Custom Function 20 to change the system's tracking sensitivity so that it won't try to focus on a passing obstruction that comes between the camera and the subject. Of course, you can also focus the lens manually (with USM lenses, you don't even have to switch to manual mode—just rotate the lens' focusing ring). The EOS-1d accepts all 10 user-interchangeable focusing screens introduced with the EOS-1v, including several with manual-focusing aids. One useful focus feature (originally introduced in the EOS Link software produced by Canon for the EOS-1v) is provided by the aforementioned Personal Function 16, which lets you set focus manually at a predetermined distance, and the camera will automatically fire when a subject arrives at that distance. Exposure The EOS-1d features the same metering system as the EOS-1v, but the partial and spot-metering areas are different due to the digital camera's smaller image area. Normally, you'll use the excellent 21-zone evaluative metering, which is linked to the 45 focusing points for amazing exposure accuracy. There's also partial metering, which emphasizes the central 13.5% of the image area (vs. 8.5% in the EOS-1v), and center-weighted average metering.Those who want the most precise control over metering will enjoy including 3.8% (vs. 2.4% in the EOS-1v) spot metering, which can be linked to one of 11 or 9 AF points via Custom Function 13. Multi-Spot Metering lets you take up to eight spot readings, viewing the relative exposure levels on the viewfinder's exposure-level scale. The EOS-1d shares the EOS-1v's exposure modes (in fact, all current EOS cameras offer these modes): shiftable program AE (to shift it, just rotate the Main Dial until the desired shutter speed or aperture is displayed), shutter- and aperture-priority AE, depth AE and metered manual. Custom Function 16 lets you activate safety shift in shutter- and aperture-priority AE, whereby the camera will automatically change the selected shutter speed or aperture if necessary to prevent over- or underexposure. Depth-of-field AE is a Canon exclusive. In it, you first autofocus on the first subject you want in focus, then on the second. The camera will calculate and set (if possible with the light level and film-speed in use) the aperture and focus point needed to get both subjects within the depth-of-field limits. You can lock-in an exposure by pressing the * button, set ±3 stops of exposure compensation (in 1/3- or 1/2-stop increments), and engage automatic exposure bracketing (with bracketing via shutter speed in aperture-priority and depth modes, via aperture in shutter-priority AE, both in program AE mode, or either in manual mode). You can also set autobracketing via the ISO speed, to maintain the same shutter speed and aperture.