This is interesting. I was trying to think of a use for my Pentax Q (since its pixel pitch is too high to adapt lenses) and have even made posts about it. I like the little camera but any lens I try to buy for it is trumped by m4/3s. -Pentax 01 Standard Prime f/1.9 (40mm eq) - I was thinking this lens would for sure be the default one to buy at around $150, but it doesn't really give me anything my Olympus PM2 + 20mm f1.7 pancake doesn't. Same exact focal length and not decidedly much smaller: http://j.mp/1rurIzj -Pentax 02 Standard Zoom f2.8-4 (28-80mm eq) - After seeing the sub $100 price for this lens used and the relatively fast speed I figured this would be the one. I do own the Panasonic 12-32mm pancake (similar FL, f3.5-5.6, however) for my PM2 and the combo is quite a shorter than the Q + the Standard Zoom: http://j.mp/1tqc3HV -Pentax 04 Wide Toy Lens f7.1 (35mm eq) OR 07 Mount Shield f9 (53mm eq) - both small and could be really fun. But, then again, I already have the Olympus 15mm f8 Body Cap Lens which is 1/2" long and I can push the ISO to 3200 and be happy with that. The Q I wouldn't go over ISO800. Plus I have the 14. Neither lenses exact but sizes comparison similar: http://j.mp/1tqegTz And yes, the body of the Q is definitely smaller than my PM2 (and plus I only paid $100 for it and it's all solid metal so that's probably why I like it), but then again, check it out next to the GM1: http://j.mp/1rus1tS#sthash.54Ls6rdt.dpuf m4/3s is making me want to sell this Q!