The cameras have lots of little dials, buttons and counters. If you look long enough at a camera, you can find more ways to adjust your photos than you can count, and for most of us, more than you can handle at a time. But did you know that one of the most important decisions that you can make in the preparation of the plot occurs even before you upload your movie?
The speed of the film you are using is one of the few unalterable qualities of a photograph. There are many ways to play with aperture, focus and exposure. However, once the film in a camera, there is absolutely no way to change the shape in the film before light. In each image you have already shot with a real film, you adapt to the movie speed. The film does not automatically change according to your needs, so it is important to choose the film just before you start taking pictures.
What is ISO?
Film sensitivity measure the speed of film to light. Low film speeds mean that the film is less sensitive and requires longer exposure while high speeds are very sensitive and require shorter exposures. The speed of a film is commonly known as ISO. Any film will have the ISO in the box. Some common speeds are 400, 800 and 1000 with 400 being the closest “standard”.
The ISO of the film affects all aspects of camera operation. Your light sensor (if you have one) must fit properly for the film you use, its aperture is more or less limited depending on the speed and the shutter speed is likely to increase or decrease to accommodate the film. Even digital cameras have a sensitivity of the simulated film (adjustable) on which they base their calculations.
Choosing the right speed
The ISO film determines what can be shot and how. Because high-speed film (ISO 800 or more is a good rule of thumb) requires less time to expose, you can take pictures with the shutter much higher speeds slower than a film. The end result here is a crystalline action; The fast movie is wonderful for sports shooting or anything that moves quickly. When you see a photograph of a suspended outdoor basketball player, you can bet that this image was shot in high-speed movie. With a slower ISO, the player in the picture is probably a big stain. The faster film also requires less light and can be very useful in a domestic situation where a flash is not adequate.