Film specifications#
- Manufacturer
- 3M
- Film
- Color Slide 400
- Type
- Color slide film
- Speed
- 400
- Process
- E-6
- Formats
- 110, 126, 135
- Base
- Triacetate
- Made in
- Italy
- Status
- Discontinued — replaced by Scotch Chrome 400
Character & history#
High speed color reversal film for daylight. 110 and 126 formats discontinued c1983.
Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).
Exposure guide at ISO 400#
Sunny 16 for this film: f/16 at 1/400 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 |
| EV 15 · Bright sun | — | — | 1/2000 s | 1/500 s |
| EV 14 · Hazy sun | — | — | 1/1000 s | 1/250 s |
| EV 13 · Cloudy-bright | — | 1/2000 s | 1/500 s | 1/125 s |
| EV 12 · Overcast / open shade | — | 1/1000 s | 1/250 s | 1/60 s |
| EV 10 · Sunset | 1/1000 s | 1/250 s | 1/60 s | 1/15 s |
| EV 8 · Bright interior | 1/250 s | 1/60 s | 1/15 s | 1/4 s |
| EV 5 · Home interior at night | 1/30 s | 1/8 s | 0.5 s | 2 s |
| EV 3 · City street at night | 1/8 s | 0.5 s | 2 s | 8 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 400.
- Film Photography Project Retrochrome 400 ISO 400
- 3M Scotch Chrome 400 ISO 400 · disc.
- Fujifilm Fujichrome 400 ISO 400 · disc.
- Fujifilm Fujichrome 400 Professional D ISO 400 · disc.
- Fujifilm Fujichrome Provia 400 ISO 400 · disc.
- Fujifilm Fujichrome Provia 400F ISO 400 · disc.
- Fujifilm Fujichrome Provia 400X ISO 400 · disc.
- Fujifilm Fujichrome Sensia 400 ISO 400 · disc.
- Imation Chrome 400 ISO 400 · disc.
More 3M films#
Frequently asked questions#
What ISO is 3M Color Slide 400?
400 — set your meter to ISO 400 for box speed.
Is 3M Color Slide 400 still made?
No, it has been discontinued (1970s–1980s).
How do I develop 3M Color Slide 400?
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 3M Color Slide 400 available in 35mm?
Yes — formats: 110, 126, 135.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources