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Reciprocity

Kodak T-Max 400 long exposures

What a metered time becomes on T-Max 400, and the stops it adds — worked out from Kodak’s own data, never past it.

Form T-2

Your metered time

Kodak: no correction from 1/10,000 to 1 s; 10 s metered: +1/3 stop by aperture; 100 s metered: +1 1/2 stops, or 300 s

The maker’s reciprocity data ↗

Table 1

At a glance

Metered Expose for Added
1 s 1 s —

Longer times are beyond the maker’s table and are not published.

Other films with reciprocity data

Other films with reciprocity data

The reciprocity calculator ›