Minimum Shutter Speed

Minimum shutter speed = Maximum exposure time when shooting handheld

Shoot at shutter speeds faster  (or exposure time shorter than) than 1 / (equivalent) focal length for acceptable sharpness (and minimize vibration & shake)

For 300mm full frame sensor, min shutter speed = 1/300 sec

For 300mm APS-C w/1.6x crop factor, min speed = 1/480 sec (or 1/500)

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