What Is ISO In Camera Field


Over the past few years, the number of manual settings that you can control over a digital camera has been increasing. This means that you can make adjustments to the auto settings for a certain scene to have images that are well focused and exposed.

You can even have at least several controlling options to adjust the most basic functions of taking photos in point-and-shoot cameras nowadays.

The ISO is one among these settings. However, it may not be as easy as you think.

In a digital model, the measurement of ISO sensitivity is the same as that of film speed in a 35mm film camera. When you see a higher number of ISO sensitivity, it means that it requires less light to produce the image. Consequently, the shutter speed becomes faster.

Essentially, the light sensitivity of the image sensor will increase when you set the ISO to a higher level. This is useful to produce nice photos when you shoot photos in low light conditions. However, when increasing the ISO, you may get more grainy photos or in another word, photos with noise. In this situation, there are a number of pixels which have not been correctly recorded by the image sensor of the camera.

However, when it is impossible to use the flash for low light circumstance or you’re shooting moving subject, the possibility to use the ISO is great. It can be better to have a photo under the average level than not to have any photo at all.

If finally you decide to use the ISO settings with your digital model, please read the following tips to find out more useful information about the way to adjust the ISO settings on your camera.

  • The common ISO range for a point and shoot model is often from 100 to 3200. And the ISO for high-end cameras, including both models using fixed lens and interchangeable lens is up to 12800 and even higher.
  • You’ll need to use the manual control or Program mode to be able to make adjustments on the ISOs. This is true for most digital models. It is pretty easy to adjust the ISO in most DSLR models, but it will require you to go through several menus on the screen to adjust the ISO.
  • The ISO range is often shown on the LCD together with other photography settings. If the ISO settings and other photography settings do not appear, you can press the Info button to figure out this situation.
  • If there is no Info button and you cannot figure out where the ISO setting is, it may require you to go through the menus of the camera to adjust the ISO settings.
  • With several DSLR cameras, it is possible to set an ISO number beyond the maximum and minimum ISO sensitivity settings by adjusting the EV settings. For instance, “Lo 0.3 EV” can lower the lowest ISO setting from ISO 200 to about ISO 160. An ISO setting of “Hi 0.7 EV” would raise the maximum ISO setting from about ISO 3200 to about ISO 5000. The particular ISO numbers with each camera’s EV settings is not completely identical, so make sure that you read your camera’s user guide carefully for the specifics.
  • Lastly, if the time of manually setting up the ISOs is more than you expect, the best way is to use shoot photos with an Auto ISO setting. The auto setting can be selected in the ISO sensitivity menu.

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