Film specifications#
- Manufacturer
- Agfa
- Film
- Agfacolor CN17
- Speed
- 40
- Process
- Agfacolor Process N
- Formats
- 135, Rapid, 127, 120, 620, Sheet film
- Base
- Triacetate
- Made in
- Germany
- Status
- Discontinued — replaced by Agfacolor CN17S
Character & history#
Universal color film, unmasked and balanced for use in daylight and artificial light, corresponding to color temperatures of about 2500K to 6500K.
Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).
Exposure guide at ISO 40#
Sunny 16 for this film: f/16 at 1/40 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 | — | 1/1600 s | 1/400 s | 1/100 s |
| EV 15 · Bright sun | 1/3200 s | 1/800 s | 1/200 s | 1/50 s |
| EV 14 · Hazy sun | 1/1600 s | 1/400 s | 1/100 s | 1/25 s |
| EV 13 · Cloudy-bright | 1/800 s | 1/200 s | 1/50 s | 1/13 s |
| EV 12 · Overcast / open shade | 1/400 s | 1/100 s | 1/25 s | 1/6 s |
| EV 10 · Sunset | 1/100 s | 1/25 s | 1/6 s | 0.6 s |
| EV 8 · Bright interior | 1/25 s | 1/6 s | 0.6 s | 2.5 s |
| EV 5 · Home interior at night | 0.3 s | 1.3 s | 5 s | 20 s |
| EV 3 · City street at night | 1.3 s | 5 s | 20 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 20 | Lower contrast, finer grain |
| Push 1 stop | EI 80 | More contrast and grain |
| Push 2 stops | EI 160 | Strong contrast, coarse grain, blocked shadows |
| Push 3 stops | EI 320 | 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 color negative film around ISO 40.
- CineStill 50D ISO 50
- Lomography Redscale XR ISO 50
- Silberra Color 50 ISO 50
- ADOX NC 17 ISO 40 · disc.
- Agfa Agfacolor CN17M ISO 40 · disc.
- Agfa Agfacolor CN17S ISO 40 · disc.
- Agfa Negativfilm Ultra K ISO 40 · disc.
- Agfa Negativfilm Ultra T ISO 40 · disc.
- Ferrania Ferraniacolor N27 ISO 40 · disc.
- Foma Fomacolor N 17 / Fomacolor ND 17 ISO 40 · disc.
- Foma Fomacolor NU 17 ISO 40 · disc.
- Forte Fortecolor ISO 40 · disc.
- ORWO NC 17 Mask ISO 40 · disc.
- ORWO Professional ISO 40 · disc.
- ORWO Professional L ISO 40 · disc.
- Agfa Agfacolor Negativfilm K ISO 32 · disc.
- Foma Fomacolor Negativ ISO 32 · disc.
- Foton Fotoncolor NS ISO 32 · disc.
More Agfa films#
Frequently asked questions#
What ISO is Agfa Agfacolor CN17?
40 — set your meter to ISO 40 for box speed.
Is Agfa Agfacolor CN17 still made?
No, it has been discontinued (1956–1971).
How do I develop Agfa Agfacolor CN17?
Agfacolor Process N process.
Is Agfa Agfacolor CN17 available in 35mm?
Yes — formats: 135, Rapid, 127, 120, 620, Sheet film.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources