Atelier INDJ · Field Tool

Reciprocity Calculator

Forward: metered time, aperture and ND in, corrected exposure out. Reverse: name a target duration, get the aperture and ND routes that reach it.
Film Stock
Aperture
Metered at
f/5.6
SHOOTING AT
Same as metered — no exposure change
Metered Exposure
ND Filters (stack multiple)
Corrected Exposure
—
s
Scene Metered Time (no ND)
Target Exposure Duration
Suggested ND Filters