Craigslist can sometimes be a source of fun spending. I ran across an Olympus 15mm f/8 body cap for a good price, and found a Panasonic Lumix GF2, also at a good price, to mount it on.
I decided to set the camera to a square crop as a challenge. It's been a little difficult. I started out shooting obviously square things, but that didn't really work out. I've tried different things such as centering the subject, offsetting to the bottom or to the side. I'm not that happy with the results, but this is an ongoing challenge to stretch.
The body cap is an odd lens. There's some distortion, the corners aren't that good, and shooting at f/8 is best left for bright sunlight or web viewing. I've also cranked up the saturation to give the images that playful, toy camera look.
Using the GF2 reminded me of why I gave up on the Olympus EP-1 a few years ago: I still can't compose using the rear LCD screen. But the combination of the two can be fun. Small and very pocketable, more so than the V1. Not having to worry about focus can make for some fast, discreet shooting.
The challenge continues. In the end I'll probably give up on the GF2 as I don't need a fourth system (hmm, F-mount, CX, m43, and what's the fourth?). But the two cost so little that it's fun just to have another option.