Film specifications#
- Manufacturer
- AgfaPhoto
- Film
- CTprecisa 100
- Type
- Color slide film
- Speed
- 100
- Process
- E-6
- Formats
- 135-36
- Base
- Triacetate
- Made in
- Italy
- Status
- Discontinued — replaced by CTprecisa 100 (2009)
Character & history#
General purpose slide film produced by Ferrania, initially using Agfa chemicals. Ferrania version identified by picture of yellow boats on outer box.
Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).
Exposure guide at ISO 100#
Sunny 16 for this film: f/16 at 1/100 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 | — | — | 1/1000 s | 1/250 s |
| EV 15 · Bright sun | — | 1/2000 s | 1/500 s | 1/125 s |
| EV 14 · Hazy sun | — | 1/1000 s | 1/250 s | 1/60 s |
| EV 13 · Cloudy-bright | 1/2000 s | 1/500 s | 1/125 s | 1/30 s |
| EV 12 · Overcast / open shade | 1/1000 s | 1/250 s | 1/60 s | 1/15 s |
| EV 10 · Sunset | 1/250 s | 1/60 s | 1/15 s | 1/4 s |
| EV 8 · Bright interior | 1/60 s | 1/15 s | 1/4 s | 1 s |
| EV 5 · Home interior at night | 1/8 s | 0.5 s | 2 s | 8 s |
| EV 3 · City street at night | 0.5 s | 2 s | 8 s | 30 s |
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 slide film around ISO 100.
- Flic Film Chrome ISO 100
- Fujifilm Fujichrome Provia 100F ISO 100
- Fujifilm Fujichrome Velvia 100 ISO 100
- Ilford Ilfochrome 100 ISO 100
- Kodak Ektachrome E100 ISO 100
- Rera Chrome 100 ISO 100
- 3M Color Slide 100 ISO 100 · disc.
- 3M Scotch Chrome 100 ISO 100 · disc.
- Agfa Agfachrome 100 RS ISO 100 · disc.
- Agfa Agfachrome CT 100 ISO 100 · disc.
- Agfa Agfachrome CT 100i ISO 100 · disc.
- Agfa Agfachrome CT 100x ISO 100 · disc.
- Agfa Agfachrome R100S Professional ISO 100 · disc.
- Agfa Agfachrome RSX 100 ISO 100 · disc.
- Agfa Agfachrome RSX II 100 ISO 100 · disc.
- Agfa Agfacolor/Agfachrome CT21 ISO 100 · disc.
- Agfa CTprecisa 100 ISO 100 · disc.
- AgfaPhoto CTprecisa 100 (new) ISO 100 · disc.
More AgfaPhoto films#
Frequently asked questions#
What ISO is AgfaPhoto CTprecisa 100?
100 — set your meter to ISO 100 for box speed.
Is AgfaPhoto CTprecisa 100 still made?
No, it has been discontinued (2005–2009).
How do I develop AgfaPhoto CTprecisa 100?
E-6 process. Colour reversal (slide) chemistry. Fewer labs run E-6 today; it can be cross-processed in C-41 for saturated, contrasty colours.
Is AgfaPhoto CTprecisa 100 available in 35mm?
Yes — formats: 135-36.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources