Exposure Calculator (Sunny 16 & Reciprocity)
Estimate exposure with the Sunny 16 rule and correct for film reciprocity failure on long exposures.
Sunny 16 (estimated exposure)
- Suggested aperture
- f/16
- Suggested shutter speed
- 1/400
Reciprocity-failure correction
- Corrected exposure time (s)
- 6.1
Reciprocity failure varies widely by film and conditions; this is a power-law approximation. Confirm exact values with each film's datasheet.