Film specifications#
- Manufacturer
- Kodak
- Film
- Portra 100T
- Speed
- 100
- Process
- C-41
- Formats
- 135, 120, sheet film
- Base
- T/P
- Made in
- US
- Status
- Discontinued — replaced by None
Character & history#
Professional color film, 'Tungsten' for outstanding color accuracy under tungsten lightning (3200K). Improved long exposure performance. Suitable for advertising and architecture photography and art reproduction. (100T)
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 |
Push & pull options#
Tell your lab how many stops you pushed or pulled so development is adjusted for the whole roll.
| Adjustment | Rate the film at | Effect |
|---|---|---|
| Pull 1 stop | EI 50 | Lower contrast, finer grain |
| Push 1 stop | EI 200 | More contrast and grain |
| Push 2 stops | EI 400 | Strong contrast, coarse grain, blocked shadows |
| Push 3 stops | EI 800 | Strong contrast, coarse grain, blocked shadows |
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 negative film around ISO 100.
- CatLABS X FILM 100 Color ISO 100
- Film Photography Project Basic color film ISO 100
- Film Washi 'X' ISO 100
- Flic Film Elektra 100 ISO 100
- Fujifilm Fujicolor 100 ISO 100
- Kodak Ektar 100 ISO 100
- Kodak Kodacolor 100 ISO 100
- Kodak ProImage 100 ISO 100
- Lomography Color Negative 100 ISO 100
- Lomography LomoChrome Metropolis XR ISO 100
- Lomography LomoChrome Purple XR ISO 100
- Lomography LomoChrome Turquoise XR ISO 100
- Optik Oldschool SantaColor 100 ISO 100
- Rera Cool 100 ISO 100
- Silberra Color 100 ISO 100
- Harman Phoenix 125 ISO 125
- Harman RED 125 ISO 125
- Harman Switch Azure 125 ISO 125
More Kodak films#
Frequently asked questions#
What ISO is Kodak Portra 100T?
100 — set your meter to ISO 100 for box speed.
Is Kodak Portra 100T still made?
No, it has been discontinued (?–2006).
How do I develop Kodak Portra 100T?
C-41 process. Standard colour-negative chemistry available at almost every lab and in home kits (Tetenal/Cinestill Cs41).
Is Kodak Portra 100T available in 35mm?
Yes — formats: 135, 120, sheet film.
Sources & licences#
- Wikipedia: List of discontinued photographic films — CC BY-SA 4.0
Last updated October 03, 2026 · How we calculate · Sources