Find a new shutter speed that changes exposure by a chosen number of stops.
Each positive stop doubles the shutter denominator, halving the light and freezing more motion, while negative stops lengthen the exposure. Reciprocity lets you trade aperture, ISO and shutter freely to keep the same total exposure for a creative look.
Shutter Reciprocity
New shutter = base x 2^stops
New shutter = base x 2^stops Each positive stop doubles the shutter denominator, halving the light and freezing more motion, while negative stops lengthen the exposure.
Reciprocity lets you trade aperture, ISO and shutter freely to keep the same total exposure for a creative look.
This calculator takes 2 inputs: Base shutter (1/x s), Stops of change. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.