Color negative film · In production

Kodak Ektar 100

Kodak Ektar 100 is a color negative film rated at ISO 100, developed in C-41. Below: specs, an exposure guide and similar stocks.

ISO 100C-41In production135-361204x5"
ISO 100
Box speed
Color negative
Type
C-41
Process
In production
Status
2008-
Years made

Film specifications#

Manufacturer
Kodak
Film
Ektar 100
Speed
100
Process
C-41
Formats
135-36, 120, 4x5", 8x10"
Base
T/P
Made in
USA
Status
In production

Character & history#

Professional fine grain film with ultra-vivid colors for nature, travel & fashion photography. Sheet film – PET base. Since January 2026 also sold directly by Eastman Kodak.

Description adapted from Wikipedia’s “List of 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.

Lightf/2f/4f/8f/16
EV 16 · Snow / beach, bright sun——1/1000 s1/250 s
EV 15 · Bright sun—1/2000 s1/500 s1/125 s
EV 14 · Hazy sun—1/1000 s1/250 s1/60 s
EV 13 · Cloudy-bright1/2000 s1/500 s1/125 s1/30 s
EV 12 · Overcast / open shade1/1000 s1/250 s1/60 s1/15 s
EV 10 · Sunset1/250 s1/60 s1/15 s1/4 s
EV 8 · Bright interior1/60 s1/15 s1/4 s1 s
EV 5 · Home interior at night1/8 s0.5 s2 s8 s
EV 3 · City street at night0.5 s2 s8 s30 s

Push & pull options#

Tell your lab how many stops you pushed or pulled so development is adjusted for the whole roll.

AdjustmentRate the film atEffect
Pull 1 stopEI 50Lower contrast, finer grain
Push 1 stopEI 200More contrast and grain
Push 2 stopsEI 400Strong contrast, coarse grain, blocked shadows
Push 3 stopsEI 800Strong contrast, coarse grain, blocked shadows
Developing C-41: Standard colour-negative chemistry available at almost every lab and in home kits (Tetenal/Cinestill Cs41).

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.

More Kodak films#

Frequently asked questions#

What ISO is Kodak Ektar 100?

100 — set your meter to ISO 100 for box speed.

Is Kodak Ektar 100 still made?

Yes, it is currently in production (2008-).

How do I develop Kodak Ektar 100?

C-41 process. Standard colour-negative chemistry available at almost every lab and in home kits (Tetenal/Cinestill Cs41).

Is Kodak Ektar 100 available in 35mm?

Yes — formats: 135-36, 120, 4x5", 8x10".

Sources & licences#

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

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