Reciprocity
Kodak T-Max 100 long exposures
What a metered time becomes on T-Max 100, and the stops it adds — worked out from Kodak’s own data, never past it.
Form T-2
Your metered time
Kodak’s table: 10 s → 15 s, 100 s → 200 s. At 1 s Kodak gives +1/3 stop by aperture only, which is not a time
Table 1
At a glance
| Metered | Expose for | Added |
|---|---|---|
| 1 s | 1 s | — |
| 2 s | 2.3 s | +0.2 stops |
| 4 s | 5.1 s | +0.4 stops |
| 8 s | 12 s | +0.5 stops |
| 15 s | 24 s | +0.7 stops |
| 30 s | 52 s | +0.8 stops |
| 1 min | 1 min 53 s | +0.9 stops |
Longer times are beyond the maker’s table and are not published.
Other films with reciprocity data
Other films with reciprocity data
- Bergger Pancro 400
- Foma Retropan 320 Soft
- Fomapan 100 Classic
- Fomapan 200 Creative
- Fomapan 400 Action
- Fujifilm Fujicolor C200
- Fujifilm Neopan 100 Acros II
- Fujifilm Provia 100F
- Fujifilm Superia X-TRA 400
- Fujifilm Velvia 100
- Fujifilm Velvia 50
- Harman technology Phoenix 200
- Harman technology Phoenix II 200
- Ilford Delta 100 Pro
- Ilford Delta 3200 Professional
- Ilford Delta 400 Professional
- Ilford FP4 Plus
- Ilford HP5+
- Ilford Ortho Plus
- Ilford Pan F Plus
- Ilford SFX 200
- Ilford XP2 Super
- Kentmere Pan 100
- Kentmere Pan 400
- Kodak Ektachrome E100
- Kodak T-Max 400
- Kodak Tri-X
- Kodak Tri-X 400
- Rollei RPX 100
- Rollei RPX 25
- Rollei RPX 400