What ISO 200 means for film
ISO 200 describes how sensitive a film is to light. It is a mid-low speed: more sensitive than ISO 100 and half as sensitive as ISO 400. In practice it needs about twice as much light as ISO 400 for the same result. Slower films generally show finer grain, so ISO 200 sits in a useful middle ground for daylight work. For the wider picture of how film speed fits with aperture and shutter, see our guide to exposure on a film camera.
Starting settings for ISO 200 film
The Sunny 16 rule is a convenient starting point: in bright sun, use f/16 and a shutter speed close to the film speed. For ISO 200 that is about 1/200 s, usually set as 1/250 s. These are approximate starting points rather than fixed answers, and a meter will refine them.
| Light | Aperture | Shutter speed |
|---|---|---|
| Bright sun, distinct shadows | f/16 | 1/250 s |
| Slight haze, soft shadows | f/11 | 1/250 s |
| Light overcast | f/8 | 1/250 s |
| Heavy overcast | f/5.6 | 1/250 s |
| Open shade | f/4 to f/5.6 | 1/250 s |
Any combination with equal light works. For example, f/8 at 1/500 s matches f/11 at 1/250 s. Indoors, ISO 200 usually needs a wide aperture, a slow shutter speed, a tripod, or flash.
What is the shutter speed for 200 film?
There is no single shutter speed for ISO 200 film. It depends on the light and the aperture. In bright sun at f/16 it is about 1/250 s, as above. In dimmer light the speed gets slower for the same aperture. A common guide for handheld shooting is a speed at least as fast as one over the focal length of your lens, for example 1/60 s or faster with a 50mm lens.
ISO 200 vs ISO 400
The key differences are:
- Light needed. ISO 400 is one stop more sensitive, which gives you faster shutter speeds or smaller apertures in the same light.
- Grain. ISO 200 tends to look a little finer, though the difference depends on the specific film stock.
- Flexibility. ISO 400 copes better with shade, indoor light, and moving subjects. ISO 200 suits sunny days, travel, and landscapes.
- Availability. ISO 200 film is less common than 100 and 400, so check what is currently sold.
Many photographers use ISO 400 as an all-round film and choose 200 when they know they will shoot mostly outdoors in good light.
How to change ISO on a film camera
You cannot change the ISO of film that is already loaded in the camera. What you can do is tell the camera what film is in it.
- Manual ISO dial. Many SLRs and rangefinders have a dial or ring near the shutter speed dial. Set it to match the film.
- DX coding. Many 35mm cameras read the film speed from the checkerboard pattern on the canister. Check your manual to see whether yours does this automatically.
- No meter. Use the film’s speed with Sunny 16 or a handheld meter.
Remember to reset the dial when you load a different roll. On a digital camera, ISO is a sensor setting you can change from shot to shot, which is the main practical difference.
Shooting 200 film at other speeds
You can rate a film differently from its box speed, but results change.
- Rating ISO 400 film at 200 gives about one stop of extra exposure. Negative film generally tolerates this well and may show fuller shadows.
- Rating ISO 200 film at 400 underexposes by a stop. Shadows may look thin and grainy, and processing adjustments may be needed.
Whichever you choose, apply it to the whole roll and tell the lab if you are asking for push or pull processing.
When to choose ISO 200 film
- Sunny days, travel, and street photography outdoors
- Landscapes with a tripod or small aperture
- Situations where you want finer grain than ISO 400 but still some speed
If you expect shade, indoor shooting, or fast movement, consider ISO 400 instead.