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Posts: 9,770 Join Date: Dec 2007 Location: Fort Worth, Texas Real First Name: Todd Camera: Canon Can Others Edit My Photos: Yes iTrader Rating: 8 LIKES Received: 4 LIKES Given: 0 |
02-19-2009, 10:33 AM
ISO in digital photography more or less corresponds to film ratings. The lower the ISO number, the less sensitive a film was to light. For darker situations, film shooters would reach for ISO 800 or ISO 1600, 3200, etc. In daylight, ISO 100 or 200 works well. A digital camera lets you switch mid-stream. There are limitations, though, as a higher ISO number in digital can translate to more "noise," visible and kind of ugly pixelization.
White balance is a digital-only concept. It is how the digital sensor "sees" certain kinds of light. For example, florescent light can have a greenish tint. By setting your camera's white balance to the florescent setting, it will take out some of the greenish tint. The shade setting can add a little bit of warming (orange) tones to an otherwise cold (blue) scene.
"Fast" lenses have larger maximum apertures. The smaller the number, the bigger the aperture. Fast probably begins in the f/2.8 range, but not all f/2.8 lenses are "better." That's a complicated issue!
For more on these things, enjoy poking around the forum. There's a ton of info here! |
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