Thread: Grainy digital images
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Old 26-01-09, 18:49
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Birdsnapper Birdsnapper is offline  
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Quick rule of thumb for telephoto work is that the speed should be the inverse of the focal length times 1.6 (for crop factor). For 300mm focal length, then 300x1.6 = 480, therefore speed = 1/480th second (as Christine advised).
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