Minimum Shutter Handheld by Focal

Handheld shutter speed rule

The old reciprocal rule is easy to remember: on a full-frame body, your slowest safe handheld shutter speed is roughly t = 1/f, with f being the focal length in millimeters. These days a lot of shooters prefer to halve that and use t = 1/(2·f), just to leave a margin. So a 200 mm lens wants 1/200 s as a floor, and 1/400 s if you want the frame reliably sharp.

Shooting APS-C or Micro Four Thirds? Multiply by the crop factor first (1.5×, 1.6× or 2×). The narrower field of view crops in tighter, which means it also magnifies whatever shake you bring to the shot. Optical stabilization (IS, VR, OSS, OIS) usually hands back 4–5 stops of room, so in a best-case scenario that same 200 mm lens can hold at 1/15 s.

Applications

Think wildlife and sports telephotos, street work, travelling light without a tripod, covering an event by whatever light is in the room. Basically any dim situation where you'd rather push the ISO or open up the aperture than lug a tripod around.

FAQ

Does the rule apply to high-megapixel sensors? Not really. Once you're at 45 MP or higher (Sony A7R, Nikon Z7, Canon R5), reach for the doubled version 1/(2·f) — that pixel density picks up motion blur you'd never have noticed on a lower-res body.

How do I count stabilization stops? Every stop doubles the shutter time you can get away with. On paper, five stops on a 100 mm lens takes you from 1/100 s down to about 1/3 s. Whether you actually nail it comes down to how steady your hands are.

What about video? Different game. Video follows the 180° shutter rule (shutter speed ≈ 2× the frame rate) rather than the reciprocal one. That convention is chasing natural-looking motion blur, not freezing handheld shake.