Photography Basics: Learning How to Use Film Speeds
Posted on January 30, 2010
Filed Under Digital Camera Features, Good Digital Cameras | Leave a Comment
Cameras have tons of little dials, knobs and meters. If you look long enough on a camera, you can find more ways to adjust your photographs than you can count, and for most of us, more than we can process all at once. But did you know that one of the most critical decisions you can make when preparing to shoot happens before you even load your film?
The speed of the film you use is one of the very few unalterable qualities of Brisbane portrait photography . There are a lot of ways to toy with aperture, exposure, and focus. However, once film is in a camera, there is absolutely no way to change the way that film reacts to light. In every picture you take with film, you’re adapting to the film speed. Film doesn’t automatically change to suit your needs, so it’s important to choose the right film before you start taking pictures.
ISO and You The film speed measures how sensitive the film is to light. Low film speeds mean that the film is less sensitive and needs a longer exposure while high speeds are very sensitive and need shorter exposures. The speed of a film is commonly known as its ISO. Every film you buy will have its ISO marked on the box, and common speeds are 400, 800, and 1000, with 400 being the closest to the “standard.”
The ISO of your film affects every aspect of the way your camera works. Your light sensor (if you have one) has to be set correctly for the film you’re using, your aperture will be more or less limited depending, and your shutter speed will likely have to decrease or increase to accommodate the film. Even digital cameras have a simulated (and adjustable) film speed that they base their calculations on.
Selecting the Right Speed The ISO of your film decides what you are capable of photographing, and how. Because high speed film needs less time to expose (ISO 800 or higher is a good common rule), you can take images with much higher shutter speeds than with slower film.If you want to know something about Brisbane corporate photography and Brisbane portrait photographer ,click on the links in this article.
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