 BetterPhoto Member |
400 speed film Hi, I have some general questions about 35mm, 400 speed film (B&W or color). If you are taking indoor, "people" photos with a flash (max. 5 feet away), what type of aperture adjustment do you need to make on your camera based on the higher speed film in an effort to avoid over exposure? I usually keep my shutter speed at 1/60 sec. when using a flash. Does that need to be adjusted as well? Thanks,
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
This a flash with an auto setting and a sensor? Or a typical built in flash? Flashes can have minimum ranges as well as maximum ranges. Lots of people get a few feet away when they want pictures of their new baby on it's first xmas, and end up over exposing so much the mess up the color. Over exposing a little bit can just be printing darker, so you can't tell. Going too far can make everything look pink or blue.
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Jon Close |
The flash duration is very short, on the order of 1/500 to 1/10000 second, so changing the shutter speed has no effect at all on flash exposure. To adjust for close flash to subject distance you should close the aperture down. Check your user manuals. Auto flash exposure specifies a minimum flash-to-subject distance. For example, with ISO 100 film the Vivitar 283's auto flash range is 4-30 ft at f/4 and 3-15 ft at f/8. With ISO 400 (2 stops faster) you'd have to set f/16 to shoot that close. If you're too close or set to wide an aperture the flash will overexpose your subject.
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