Film Long Exposure Calculator

For long exposures, some films need more exposure than the meter indicates. Choose your film and enter the metered time to calculate the exposure using published Ilford and Fujifilm data.

Ilford Reciprocity Failure Compensation v2 (2024)
Input Mode

Exposure Result

Corrected exposure time:1 s
  • Metered (Base):1 s
  • Correction:+0.0 EV
Equivalent exposures:
  • f/1.4: 1/32 s
  • f/2: 1/16 s
  • f/2.8: 1/8 s
  • f/4: 1/4 s
  • f/5.6: 1/2 s
  • f/11: 2 s
  • f/16: 4 s
  • f/22: 8 s
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