EdM wrote:Digital seems to lack the range between hilites and shadow areas.
DSLRs tend to have characteristics similar to slide film, particularly when you shoot in JPEG mode. However, they also have a raw mode, which is a direct dump of the image sensor. Such images
must be postprocessed to produce useful pictures, but it can be worth it, especially in difficult lighting situations.
Cameras that can shoot in raw mode can capture a lot more than one can normally see when shooting in JPEG mode. Most raw images contain 12 bits per color channel per pixel, giving 4096 levels of brightness. Computer displays normally can't take advantage of this directly, but by converting the raw images to 48-bit format and using a 48-bit-capable photo editor (e.g. Photoshop CS, Picture Window Pro, Cinepaint), you can bring out shadow detail very well. It is more work, but the results can be quite good.
If your monitor is calibrated (
very important for photo work), the darkened lenses of
this semaphore that I shot are visible in spite of the backlighting and the non-use of exposure compensation, and they're also visible in the print I made.
Another tactic that can be used with raw mode is to postprocess two copies of the raw image, one for highlights and one for shadows, and merge them. I have yet to try this, though.
One of the most important tools in the digital realm is the histogram. It shows a graph of how many pixels are present at each light level. Most high-end digital cameras have the ability to display a histogram when you preview an image, and some can even show overexposed areas by making them blink. As with slide film, overexposing with digital will blow out highlights, and they can't be recovered. The general rule is, expose "to the right" on the histogram, but try to stay just short of overexposure.
Some very nice sites for digital techniques:
http://normankoren.com/
http://luminous-landscape.com/
My Drebel has shown me that there's a lot more to digital photography than merely pointing and shooting.
In any case, the images I've taken with it are at least as good in quality as my old favorite, Kodachrome 64, scanned at 2400 DPI. Even at ISO 800, the Drebel's images come out very nice, and, IMHO, the Drebel at ISO 1600 isn't any worse than fast print films.