Moving from the darkroom to digital has saved thousands of dollars in film and processing costs (not to mention a reduction in environmental degradation) but has added a new set of challenges to the art and business of photography. Perhaps foremost among the problems presented by digital photography is noise. Those pesky red, green, and blue (or light and dark) specks in an image can ruin a digital photo. Noise is generally most prominent in shadow areas and against dark colors in your images.
If your camera lets you select an ISO setting, you can help minimize digital noise in your photos by using a low ISO. Sometimes you do need to shoot the equivalent of faster film, such as at sporting events. However, when you have a choice, use a low ISO to minimize noise. And using a tripod can help, too!
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Although we usually tend to think of the digital camera as the best thing since sliced bread, there are both pros and cons with its use. Nothing is available on the market that does not have both a good and a bad side, but the key is to weigh the good against the bad in order to come up with the best of both worlds.