For those of you who haven't seen it, there's now a contest designed just for us:
http://www.lensrentals.com/blog/2013...-photo-contest
No artistic merit, just pixel-peeping nerdliness. Our own Bryan Carnathan is one of the judges.

My first entry is going in the 'how much stuff can I fit twixt camera and lens' because I've already got a bunch of photos on that, no need for taking new shots (although I own a lot more teleconverters and tubes now, maybe I should take a new one).