Film specifications#
- Manufacturer
- Agfa
- Film
- Agfachrome CT 100x
- Type
- Color slide film
- Speed
- 100
- Process
- AP 44 / E-6
- Formats
- 135
- Base
- Triacetate
- Made in
- Germany
- Status
- Discontinued — replaced by Agfa CTprecisa 100
Character & history#
Consumer general purpose color slide film. Launched at Photo Marking Association in 1995 with improvements in color intensity, accuracy, and edge definition along with enhanced pushability.
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 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 ISO 100 · disc.
- AgfaPhoto CTprecisa 100 (new) ISO 100 · disc.
More Agfa films#
Frequently asked questions#
What ISO is Agfa Agfachrome CT 100x?
100 — set your meter to ISO 100 for box speed.
Is Agfa Agfachrome CT 100x still made?
No, it has been discontinued (1995–1999).
How do I develop Agfa Agfachrome CT 100x?
AP 44 / 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 Agfa Agfachrome CT 100x available in 35mm?
Yes — formats: 135.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources