Almost all digital cameras with interchangeable optics display a symbol that looks like a crossed-out circle. This symbol isn't a contemporary feature but was already seen on film devices.

The circle symbol on a care label indicates that the item can be dry-cleaned. An empty circle means that the garment should ...

A circle means the garment is suitable for dry cleaning ... Symbol on the left means you can wring out your clothes Symbol on the right with a cross through it means don't do this If you're looking ...