ISO ON CAMERA MEANING ISO
Change the ISO to 800, and the shutter speed will be 1/125 second. Change the ISO to 400, and the camera will now be able to take the same photo at 1/60 second, which is probably good enough to take a sharp photo. Put another way, suppose your camera is currently trying to take a photo at a shutter speed of 1/15 second at an ISO of 100. If you go from ISO 100 to ISO 400, that's two stops of exposure change (doubled and then doubled again), so that's equivalent to changing the shutter speed from 1/60 second to 1/15 second. So in this sense, ISO is like shutter speed or aperture. What, for example, is the difference between ISO 100 and ISO 200? Thankfully, cameras use a fairly consistent set of conventions, so that doubling the ISO doubles the light sensitivity. It's also worth pointing out what the ISO numbers mean. I'm not a huge fan of Auto ISO because I don't know exactly what the camera is doing, but it's a convenient way to ensure you get the sharpest results without sweating over the settings. On many cameras, you can set the ISO to Auto and it'll dial the ISO up and down on its own when you shoot in certain modes (like Automatic exposure mode). Check your camera's user guide for details.
![iso on camera meaning iso on camera meaning](https://static.photocdn.pt/images/articles/2017_8/iStock-108163277.jpg)
You might also be able to rely on your camera's Auto ISO setting. But don't fret too much about this: It's a lot better to capture a sharp photo with some noise in it than a shaky photo that was shot too slow for the available light. I'd suggest going with the lowest ISO that'll give you a satisfactory photo in order to avoid introducing too much noise in the image. In that case, crank up the ISO until the camera stops giving you a slow shutter warning. What kinds of reasons? Imagine you're outdoors late in the day trying to take some photos and your flash won't illuminate the scene because it's too large or far away.
![iso on camera meaning iso on camera meaning](https://photographylife.com/wp-content/uploads/2018/01/ISO-Sensitivity-Settings.png)
On many cameras, that means dialing in ISO 100 and leaving it there unless you have a good reason to increase it. It's a good idea to always shoot with the lowest possible ISO you can get away with. Notice the rough, sandpaper-like quality of everything in the scene, including the wall and the girl's complexion.
![iso on camera meaning iso on camera meaning](https://static.bhphotovideo.com/explora/sites/default/files/mainiso.png)
On the left is an enlarged detail of a photo taken at ISO 1000. On the same camera, a picture captured at ISO 800 will tend to look noisier-random pixels that resemble grain on an old film camera or static on a television screen-than a photo shot at ISO 100. Higher ISO values give your camera a better light response, so you can take sharper photos with shorter shutter speeds in low light, but this comes at the expense of more digital noise in your photo. That's because ISO is a bit of a mixed bag.