OS on my new Sigma

[jamiebonline]

Hi all,

I just bought a very nice new Sigma lens and it has OS. I understand, rightly or wrongly, thatthe effects of camera shake from handholding appears when the camera uses a focal length which is longer than that of the shutter speed. e.g. if the focal length is 50mm and I go below 1/50th of a second in shutter speed, then shake shows up in the pictures. Blurriness sets in. If this is wrong please tell me

Does anyone here know how much lower I can reduce the shutter speed before blur or lack of sharpness occurs when I use the OS system? Or how would I find that out? Thanks a lot


J

 

[jpw]

The old guideline was 1/focal length (35mm equivalent) so 1/50s for 50mm on full frame, 1/(50x1.5) = 1/75s on a 1.5 crop sensor for example. However with current high-pixel count sensors this can be a bit of a stretch, and your hand holding technique can have a lot of bearing on it, so trial and error is the only real way of establishing it.

 

[dinorock]

this was taken at 500mm using os on a sigma 150-500 shutter speed 1/320sec, hth mike. (handheld) beware of using to fast a shutter speed while you have os on as they can cancel each other out and actually make the shot worse


sparrow (apparently "nailed to the post&quot by Mike Rockey, on Flickr