This shot was done at 25600 ISO with a Canon 5D mark 2, The reddish color in the shot is all the noise..
ISO is the definition of how long it takes to make a photo with a specific amount of light.
100 ISO film usually requires you to be outside on a really sunny day. If you used this film indoors, you will need to use a flash.
400 ISO film usually allows you to take shots inside. You could use the film in an outside environment, but some cameras would not be able to fire fast enough to prevent the finishing shot from looking too light.
In digital photography, ISO is the definition of how much graininess or noise the shot will have. With digital photography, you can change the ISO on the fly to suit your needs. The higher the ISO, the noisier or grainier the photo will look, but you will be able to take faster shots in darker environments.
In general, it’s best to shoot at the lowest ISO setting appropriate for what you’re shooting, so your photos can be as sharp as they can possibly be.
This is the same shot at 100 ISO with the same camera. Much blacker eh?
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Tags: camera, ISO, photography