Film specifications#
- Manufacturer
- Gevaert
- Film
- Gevacolor R3
- Type
- Color slide film
- Speed
- 12
- Process
- Agfacolor
- Formats
- sheet film
- Base
- Triacetate
- Made in
- Belgium
- Status
- Discontinued
Character & history#
Reversal studio film balanced for artificial light. Most likely discontinued in the 50s.
Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).
Exposure guide at ISO 12#
Sunny 16 for this film: f/16 at 1/13 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 | 1/2000 s | 1/500 s | 1/125 s | 1/30 s |
| EV 15 · Bright sun | 1/1000 s | 1/250 s | 1/60 s | 1/15 s |
| EV 14 · Hazy sun | 1/500 s | 1/125 s | 1/30 s | 1/8 s |
| EV 13 · Cloudy-bright | 1/250 s | 1/60 s | 1/15 s | 1/4 s |
| EV 12 · Overcast / open shade | 1/125 s | 1/30 s | 1/8 s | 0.5 s |
| EV 10 · Sunset | 1/30 s | 1/8 s | 0.5 s | 2 s |
| EV 8 · Bright interior | 1/8 s | 0.5 s | 2 s | 8 s |
| EV 5 · Home interior at night | 1 s | 4 s | 15 s | > 1 min |
| EV 3 · City street at night | 4 s | 15 s | > 1 min | > 1 min |
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 12.
- Fujifilm Fujicolor ISO 10 · disc.
- Ilford Colour Film A ISO 10 · disc.
- Kodak Kodachrome ISO 10 · disc.
- Agfa Umkehrfilm K ISO 16 · disc.
- ORWO UT 13 ISO 16 · disc.
- Kodak Kodachrome Professional ISO 8 · disc.
More Gevaert films#
Frequently asked questions#
What ISO is Gevaert Gevacolor R3?
12 — set your meter to ISO 12 for box speed.
Is Gevaert Gevacolor R3 still made?
No, it has been discontinued (1948–1950s).
How do I develop Gevaert Gevacolor R3?
Agfacolor process.
Is Gevaert Gevacolor R3 available in 35mm?
Not according to our data — formats: sheet film.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources