Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system introduced in 1974.

In very basic terms, ISO is simply a camera setting that will brighten or darken a photo. As you increase your ISO number, your photos will grow progressively brighter. For that reason, ISO can help you capture images in darker environments, or be more flexible about your aperture and shutter speed settings.

Feb 18, 2025 · ISO isn't an acronym and doesn't stand for anything – it simply refers to the Organization. For the photographer, ISO is simply a set of numbers. The base sensitivity – the lowest native setting – of many digital cameras is ISO100.

Jul 25, 2024 · The ability to adjust your camera's sensitivity (ISO) is one of the great advantages of digital capture. Unlike with film cameras, you can change the ISO for every shot with ease, should you wish to.

Dec 19, 2019 · Varying the ISO of your camera can have a dramatic effect on the look of your photo and along with shutter speed and aperture, it’s also part of our exposure triangle. A standardized set of numbers is used as a scale, like 100, 200, 400 & 800 (also see full table further down this article).

Apr 4, 2025 · Basically, it is a measurement system that standardizes how “sensitive” your camera film or digital sensor is to light. This helps create uniformity across photography brands and cameras. Along with aperture and shutter speed, ISO lets photographers achieve the perfect camera exposure.

The ISO scale typically ranges from 100 to 6400 or beyond, with each increment indicating a doubling of sensitivity. A lower ISO (e.g., ISO 100-400) suits well-lit conditions, while a higher ISO (e.g., ISO 800-1600 or more) accommodates low-light environments.

May 2, 2023 · ISO is measured in numbers that represent the sensitivity of the camera's sensor to light. The ISO scale typically ranges from 100 to 6400, with some cameras capable of reaching higher values. The lower the number, the less sensitive the camera sensor is …

One of the earliest ISO standards, ISO 6 allowed photographers to select the right film for their subject, taking into account things like lighting and speed of movement. If you look at any dedicated digital camera, you'll still find a reference to ISO and the time when all …

The ISO Scale. The ISO scale typically starts at 100 or 200 and can go up to 6400, 12800, or even higher on modern digital cameras. A lower ISO number means less sensitivity to light, while a higher ISO number increases the sensitivity.