I'm supposed to be doing all sorts of other work tonight, but I can't resist a good blog topic!
The lovely Rowena Field sent me a photograph that was troubling her. In it, her daughter's pink shirt appeared quite blotchy and pixelated when viewed at 100%, despite the fact that all the other detail in the image was perfectly normal, and despite the fact that she'd got good exposure at only ISO250, which is a piece of cake for her 5D.
I know this is a problem for everyone from time to time (although not everyone examines their photos as closely as Rowena!), so she cautiously gave me permission to use the photo here. Thanks, Ro!
Here's the shot: