rmalarz wrote:
PeggySue, I'm going to guess that it's not the lens, but too slow a shutter speed. The general rule of thumb is the shutter speed should be no slower than 1/focal length. Thus, for a 35mm lens, the shutter speed should be 1/30, minimum, and that's pushing it a bit. Now, I'm an FX camera user, as my signature says. If you are using a crop sensor camera, that changes the equation for the worse, not better. You'll need an even faster than 1/focal length shutter speed.
--Bob
Not off by much. . Apply the crop factor (use the "FF" equivalent) to your camera/lens combo. For an APS-C sensor, that's about 1.5x so use no slower than 1/60th sec to use that old rule of thumb. Some say twice that or 1/125th sec. which would be even better.
It originally was for 35mm cameras. You could get away with an even slower shutter with larger format.