DOF and Cropping take 2

Started Feb 11, 2014 | Discussions thread
Mark Ransom
Mark Ransom Veteran Member • Posts: 5,484
Re: DOF and Cropping take 2

I think your calculations for motion blur are off. The motion blur is caused by the motion of the camera, which is independent of sensor size - if the sensor is 1.5x smaller then the blur must also be 1.5x smaller to maintain the same visibility across the frame. So if you need 1/400 for FF, you'll also need 1/400 for APS-C and 1/400 for the Q.

Anti-shake technology may mean the 1/FL guideline can be loosened a bit, but again that should be the same for all sensor sizes.

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