As pointed out by my friend lostfunzone the micro four thirds system is a great compromise between the stuff you carry around and the pictures you get out of it. As I like to carry my camera most of the time I chose a rather small mirrorless system around my Olympus OMD-EM 10.
First to mention I am not a product photographer and there are plenty of pictures of the gear I use on the net. So I spare you looking on boring pictures of lenses and cameras. Instead I list my lenses with a short comment, the name of the lens is a link to the pictures I took with it. The lenses appear in the order I got it.
- M.ZUIKO DIGITAL ED 14‑42mm 1:3.5‑5.6 EZ Pancake - The kit lens I bought with the camera. Quite nice lens and pretty small. With that lens you can put the camera just in the pocket of a normal jacket.
- M.ZUIKO DIGITAL 45mm 1:1.8 - As some people say the lens, which shows what MFT should be all about. It's small, it's light, it's not that expensive and delivers a great image quality with creamy bokeh.
- M.ZUIKO DIGITAL ED 40‑150mm 1:4.0‑5.6 R - Telephoto zoom lens. It's made completely of plastic which gives it a little bit of a cheapish touch. But it's damn light for a zoom and with good light fast enough to shoot some birds.
- M.ZUIKO DIGITAL 25mm 1:1.8 - The equivalent of a nifty fifty on a full frame system. Fast. Sharp. Very nice bokeh. My alway on lens.
- M.ZUIKO DIGITAL ED 9‑18mm 1:4.0‑5.6 - This an ultra wide angle not quite as fast as the new 7-14mm PRO but still okay for landscape and pretty small, too. At the short end you may see some distortion but I guess that's just the laws of optics.
- LEICA DG SUMMILUX 15mm / F1.7 ASPH.- Close to the classic 28mm wide-angle. Very solid lens. Great touch and shoot with a metal lens hood. Competing with the 25mm as always-on.