Excerpt: The 14-42 IIR kit zoom is too bulky for a jacket pocket; therefore I bought this 17 f2.8 for my E-PM2 for lightweight daily carry. This prime lens fits fine in my pocket as planned. As this stage of its life, it is being sold at a discount at most places and even cheaper bought second hand. Are there any advantages other than compact size? A review here concluded that the 14-42 is sharper than 17 f2.8; I totally disagree.
Summary: I got this lens for my Panasonic GM-1. At first, on the Internet, this lens is underrated but somehow once I recieved it tested it, this lens produce very sharp images. Personally I think handling and rotation of the lens is quite nice. Although it is bit noisy when autofocus, but it does give a good job. If you are a student and you don't have budget on f1.7, I would recommend this. A&R photo is kindly to provide a lens hood, and all accessories you need.
Summary: Bought for fixed lens complement for em-p2 two lens kit. But it wasn't quite the 'pancake' lens I imagined, not much smaller than kit lens. And more seriously it didn't attach smoothly to camera body, like something wasn't meshing. May look for another prime but for now enjoying getting to know my first 4/3.
Summary: Its not of prime lens quality. I just added another Oympus mft to my stable and compared my older 17 with the 14-42 zoom that came with the new camera. Its close to a stop faster but that's it. I just ran some tests and the zoom is a pretty equal performer with better CA's, slightly better contrast, but weaker edge resolution. The 17 prime doesn't even have an edge in bokeh.
Summary: The pen1 kit lens goes as wide angle as 14", so this basically isn't a very useful lens. The focus on manual doesn't seem to do anything when I rotate the focus ring. It makes a pen camera basically a point-and-shoot.