Reciprocity
Kentmere Pan 100 long exposures
What a metered time becomes on Pan 100, and the stops it adds — worked out from Kentmere’s own data, never past it.
Form T-2
Your metered time
Tc = Tm^P for metered times over 1 s; 1 s or less needs no correction (P = 1.26)
Table 1
At a glance
| Metered | Expose for | Added |
|---|---|---|
| 1 s | 1 s | — |
| 2 s | 2.4 s | +0.3 stops |
| 4 s | 5.7 s | +0.5 stops |
| 8 s | 14 s | +0.8 stops |
| 15 s | 30 s | +1 stops |
| 30 s | 1 min 13 s | +1.3 stops |
| 1 min | 2 min 54 s | +1.5 stops |
| 2 min | 6 min 57 s | +1.8 stops |
| 4 min | 16 min 38 s | +2.1 stops |
| 8 min | 39 min 50 s | +2.3 stops |
| 16 min | 1 h 35 min | +2.6 stops |
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 400
- Kodak Ektachrome E100
- Kodak T-Max 100
- Kodak T-Max 400
- Kodak Tri-X
- Kodak Tri-X 400
- Rollei RPX 100
- Rollei RPX 25
- Rollei RPX 400