The ability to use different lenses is one of the great advantages of interchangeable-lens photography, whether you're using a basic mirrorless model or a pro-level DSLR.
There's a lot you can do with conventional optics, such as those that come with your camera as standard, although once you start to dig around more exotic types and third-party options, you realise just how much scope there is for experimentation.
So, whether you love your landscapes or you're mad about macro, take our latest quiz and find out what you really know about the glass in front of your camera's sensor. Can you get 100%?
Best of luck – and if you do well, shout it loud and share your results!
Fancy another? Here's a quiz on full-frame cameras