What is ISO? When to increase sensitivity, types of noise and more
When to increase ISO
Some photographers try to resist increasing the ISO at all costs in search of getting the best, grain-free images. However, pumping up the ISO often actually increases image quality overall, as this simple change lets you use a faster shutter speed – thereby eliminating camera shake.
A grainy picture is always better than a blurry one! A higher ISO can also enable you use a narrower aperture – increasing depth of field, and thus increasing the resolution of a lens – to give you sharper-looking pictures.
Although higher ISO settings are invaluable in low light, they are not essential for all low-light situations, in fact, if you can keep the camera steady, they are often best avoided (find out how to reduce noise at high ISO settings).
If you are using a solid tripod, the slowest ISO setting (ISO 100) is usually the best option – as you can then use a longer shutter speed to make up for the lack of light.
Similarly, if you are using flash, high-ISO settings are not needed (although increasing the ISO will increase the effective range of your flash).
PAGE 1: What is ISO?
PAGE 2: How ISO works: free cheat sheet
PAGE 3: When to increase ISO
PAGE 4: Types of noise
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on Wednesday, June 20th, 2012 at 4:00 am under Beginner.
Tags: camera tips, DLSR tips, hot, ISO sensitivity, photography cheat sheet