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10-24-2010, 08:47 AM   #1
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Vivitar 28-210 Super Zoom

Hi, I've been shooting today using in part my Vivitar PK-A 28-210 Super Zoom lens with my P30.

Is there any advice regarding what kind of minimum shutter times I should be considering to avoid camera shake?

It's quite a long lens when on telephoto and although I have quite a steady hand I've been using my 50mm a lot lately and basing shutter times on minimum 1/60 sec to avoid shake.

Thanks

Johnct

10-24-2010, 09:22 AM   #2
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The general rule is that the shutter speed should not be less than the length of the lens.

So at 210mm your speed should not be less than about 1/200th, at 100 not less than about 1/100th.

Put it on a tripod and you can do better than that of course.
10-24-2010, 11:25 AM   #3
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Just to add that this calculation works as long as you're using film. On a crop-sensor digital body you'd need to multiply the shutter speed by 1.5 (so 1/200 would become 1/300).
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