Color slide film · In production

Film Photography Project Retrochrome 400

Film Photography Project Retrochrome 400 is a color slide film rated at ISO 400, developed in E-6. Below: specs, an exposure guide and similar stocks.

ISO 400E-6In production135-36
ISO 400
Box speed
Color slide
Type
E-6
Process
In production
Status
available
Years made

Film specifications#

Film
Retrochrome 400
Speed
400
Process
E-6
Formats
135-36
Base
Triacetate
Made in
USA
Status
In production

Character & history#

Eastman Ektachrome color positive film made for industrial and governmental applications. Color reversal camera film that is intended for photography under daylight illumination. Expired 2004, but considered to still achieve ISO.

Description adapted from Wikipedia’s “List of 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.

Lightf/2f/4f/8f/16
EV 16 · Snow / beach, bright sun———1/1000 s
EV 15 · Bright sun——1/2000 s1/500 s
EV 14 · Hazy sun——1/1000 s1/250 s
EV 13 · Cloudy-bright—1/2000 s1/500 s1/125 s
EV 12 · Overcast / open shade—1/1000 s1/250 s1/60 s
EV 10 · Sunset1/1000 s1/250 s1/60 s1/15 s
EV 8 · Bright interior1/250 s1/60 s1/15 s1/4 s
EV 5 · Home interior at night1/30 s1/8 s0.5 s2 s
EV 3 · City street at night1/8 s0.5 s2 s8 s
Developing E-6: Colour reversal (slide) chemistry. Fewer labs run E-6 today; it can be cross-processed in C-41 for saturated, contrasty colours.

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.

More Film Photography Project films#

BW 100Basic color filmBlue SensitiveBlue Ultra ColorDerev Pan 100Derev Pan 200Derev Pan 400DraculaEastman Kodak 5302 Fine GrainEastman Kodak Hi-Con 2369Eastman Kodak Hi-Fi 2374Emulsion XFilm Love (Hearts) /Film Love (Shamrocks)Fine Grain SixFrankensteinLet It SnowLow ISO Black & WhiteLow ISO ColorMz3 Fine GrainNegative X-Ray FilmNew Classic EZ400S 200 ISOSonic 25 BW FilmSuper Positive Film

Frequently asked questions#

What ISO is Film Photography Project Retrochrome 400?

400 — set your meter to ISO 400 for box speed.

Is Film Photography Project Retrochrome 400 still made?

Yes, it is currently in production (available).

How do I develop Film Photography Project Retrochrome 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 Film Photography Project Retrochrome 400 available in 35mm?

Yes — formats: 135-36.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources