‘Bollocks, it’s dark out here’, you think, and scratch your head. ‘I’d better up the ISO a little bit, to ensure that I can use a decent shutter time’. The downside of using a higher ISO, of course, is that you introduce digital noise. But where does this noise come from? Why does your image quality go down the pan as soon as you touch that ISO dial?
Read on to find out what it is, where it comes from, and what you can do about it!
A regular reader recently e-mailed me with essentially the above question – and it’s …
