Film specifications#
- Manufacturer
- Agfa
- Film
- Isochrom F
- Speed
- 32-50
- Process
- B&W
- Formats
- 135, Karat, 127, 117, 129, 120, 620, 116
- Base
- Triacetate
- Made in
- Germany
- Status
- Discontinued
Character & history#
Fine grain orthochromatic film. Roll films had initially speed of 16/10° DIN, later increased to 18/10° DIN. Other formats had speed of 17/10° DIN.
Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).
Exposure guide at ISO 32#
Sunny 16 for this film: f/16 at 1/30 s in bright sun. Negative film tolerates 2–3 stops of overexposure; slide film needs accuracy within about ⅓–½ stop.
| Light | f/2 | f/4 | f/8 | f/16 |
|---|---|---|---|---|
| EV 16 · Snow / beach, bright sun | — | 1/1250 s | 1/320 s | 1/80 s |
| EV 15 · Bright sun | 1/2500 s | 1/640 s | 1/160 s | 1/40 s |
| EV 14 · Hazy sun | 1/1250 s | 1/320 s | 1/80 s | 1/20 s |
| EV 13 · Cloudy-bright | 1/640 s | 1/160 s | 1/40 s | 1/10 s |
| EV 12 · Overcast / open shade | 1/320 s | 1/80 s | 1/20 s | 1/5 s |
| EV 10 · Sunset | 1/80 s | 1/20 s | 1/5 s | 0.8 s |
| EV 8 · Bright interior | 1/20 s | 1/5 s | 0.8 s | 3.2 s |
| EV 5 · Home interior at night | 0.4 s | 1.6 s | 6 s | 25 s |
| EV 3 · City street at night | 1.6 s | 6 s | 25 s | > 1 min |
Push & pull options#
Tell your lab how many stops you pushed or pulled so development is adjusted for the whole roll.
| Adjustment | Rate the film at | Effect |
|---|---|---|
| Pull 1 stop | EI 16 | Lower contrast, finer grain |
| Push 1 stop | EI 64 | More contrast and grain |
| Push 2 stops | EI 128 | Strong contrast, coarse grain, blocked shadows |
| Push 3 stops | EI 256 | Strong contrast, coarse grain, blocked shadows |
Long exposures#
Most films suffer reciprocity failure beyond about 1 second: they need more exposure than the meter says. As a rule of thumb add ⅓–1 stop for 1–10 s and 1–2 stops beyond 10 s for older emulsions; modern T-grain films (and Fuji Acros) need much less. Check the manufacturer's datasheet.
Similar films#
Other black-and-white negative film around ISO 32.
- Argenti Nanotomic X ISO 32
- SPUR DSX ISO 32
- Film Photography Project Eastman Kodak Hi-Con 2369 ISO 25
- Film Photography Project Sonic 25 BW Film ISO 25
- Film Washi 'W' ISO 25
- Rollei Blackbird ISO 25
- Rollei Ortho 25 Plus ISO 25
- Rollei RPX 25 ISO 25
- Silberra S25 ISO 25
- Foton Fotopan ISO 32 · disc.
- Kodak Panatomic-X ISO 32 · disc.
- ADOX KB 17 / R 17 / PL 17 ISO 40 · disc.
- Agfa Agfacontour Professional ISO 40 · disc.
- Agfa Isopan F ISO 40 · disc.
- Agfa Isopan F / IF ISO 40 · disc.
- Efke 17 ISO 40 · disc.
- Efke KB17 / R17 ISO 40 · disc.
- Foma Fomapan Brilant 17 ISO 40 · disc.
More Agfa films#
Frequently asked questions#
What ISO is Agfa Isochrom F?
32-50 — set your meter to ISO 32 for box speed.
Is Agfa Isochrom F still made?
No, it has been discontinued (c1933–1960s).
How do I develop Agfa Isochrom F?
B&W process. Traditional black-and-white development (e.g. D-76/ID-11, HC-110, Rodinal, XTOL) — easy to do at home.
Is Agfa Isochrom F available in 35mm?
Yes — formats: 135, Karat, 127, 117, 129, 120, 620, 116.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources