SUNNY 16: When you're not sure about your exposure, use the "sunny 16" rule. First of all, it has to be sunny, that's why we call it "sunny" 16. Set your aperature to f16 and your shutter-speed to 1/(your film's ASA). Most of the time your camera will not have a number that's an exact match; that's ok, just set it for the CLOSEST number. For example: if your film's ASA is 400, set your camera to f16 and 1/500 of a second. If your ASA is 100, set the camera to f16 and 1/125 of a second. HANDHELD EXPOSURES: If you get blurry pictures that are not due to focusing, your problem is probably that you are using a shutter-speed that is inappropriate for a hand-held shot. If your shutter-speed is too long, you will actually record camera movement caused by small involuntary shakes in your hands. The longer the focal length of your lens, the more this effect is noticed. As a general rule when hand-holding the camera: Use a shutter speed that is at least 1/(the focal length of your lens) or FASTER. For example: If the focal length of your lens is 50mm, you would want shutter speeds FASTER than 1/50 of a second. Therefore the slowest shutterspeed you should use is 1/60 of a second (the bigger the lower numer, the faster (shorter) the exposure). If you were using a 200mm lens, you should use 1/250, 1/500, 1/1000, or faster if your camera is capable.
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