How to tell if you're a Photoshop geek ...
You're walking down the road and you notice some petrol spilt on a wet concrete pavement. You think:
a) that's pretty.
b) I hate this sort of urban pollution.
c) LAB color mode.
And if you don't get it, you needn't worry, it just means that you're not a geek ;-)
EF 17-40 f/4L USM
40mm (64mm equiv.)