IS and Sports question

[Sean Setters]

The general rule is 1/(effective focal length). Let's say you're using a 100mm lens on a camera body with an APS-C (1.6x) sized sensor. You multiply the focal length by the sensor multiplier, giving you an effective focal length of 160mm. That would mean you typically need 1/160 second or faster shutter speed to prevent blur from camera movement.

[LJ2b2c]

I had seen that calculation before, but thought it was more for the motion of the subject, not the camera. Thanks.