Flash Like most pro SLRs, the Pro SLR/c lacks a built-in flash unit (although the DCS Pro SLR/n has one), but it has a hot-shoe for dedicated accessory flash units, and a PC terminal to connect studio flash systems. Normal maximum flash-sync shutter speed is 1¼180, although appropriate dedicated flash units in High Speed Sync mode allow shooting with flash up to the camera’s top shutter speed of 1¼6000. Flash features with appropriate dedicated flash units (Canon Speedlites 220EX, 420EX and 550EX, and Sigma EF-500 DG Super) include E-TTL autoflash, flash exposure lock, flash exposure compensation, flash exposure bracketing and E-TTL wireless flash with one or more off-camera flash units. When you press the depth-of-field preview button, the flash will fire a quick sequence of bursts, allowing you to preview the flash lighting effect. Digital Features The DCS Pro SLR/c can capture RAW images at three resolutions (4500x3000/13.5MP, 3000x2000/6.0MP and 2250x1500/3.4MP), and JPEGs at four resolutions (the three RAW resolutions, plus 1125x750/0.8MP. When shooting JPEGs, you can choose three quality levels: Good, Better and Best. The lower RAW resolutions are achieved by interpolating and resampling the full-resolution RAW image and losslessly compressing it. JPEGs can be shot as standard JPEGs or ERI (extended-range) JPEGs, which provide some of the RAW-image post-shooting adjustment capability. You can (via LCD monitor menus) select exposure bias (from –0.5 to +0.5, in 0.1-stop increments), look (Portrait, with lower contrast; Product, with higher contrast and color saturation; wedding, with neutral shadows; or event, with high saturation and optimized skin tones); noise reduction (normal or strong) and sharpening level (None, Low, Medium or High). There are two card slots: one for CompactFlash cards and Microdrives, and one for SD and MMC cards. You can use just one card, in either slot. If you put cards in both slots, you can record images on the card in one slot, with the card in the other slot designated standby (to be used when the first card fills up), or record an image on cards in both slots simultaneously, or record a RAW image on one card and a JPEG image on the other card, or record RAW plus JPEG images on each card simultaneously, or any other combination. White-balance settings include auto, daylight, tungsten, fluorescent, flash and click-balance, in which you move an eyedropper over a current or previously saved image and click on a neutral area. We found the auto setting worked quite well for pre-dawn through high-noon sun lighting outdoors. ISOs range from 160 to 1600, with best image quality at ISO 160 (use ISOs above 800 only when really necessary). You can set ISOs by pressing the ISO button and rotating the C dial until the desired figure appears on the LCD panel, or via the LCD monitor menus. In “Longer” exposure mode, you can set ISOs of 6, 12, 25 or 50 (and simultaneously activate the camera’s noise-reduction feature). ISOs from 6–800 are fully calibrated; ISOs from 1000–1600 are uncalibrated, and available only with RAW images.