just x joey
TPF Noob!
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- Jan 20, 2007
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- 946
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- Ocean City, MD
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- joeydsmith.com
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if a lens has a IS 3-stop protection or whatever, does that mean, u can have the shutter open long enough to be equivelent to 3 fstops? so say the lens is rated for f/4 does the IS mean u can hold the exposure open hand held to be equivilent to a f/1 lens? or what? im looking at the 17-85mm canon USM IS lens, im wondering if the IS will enable me to use this lens in low light situations?