If you've just bought the Olympus OM D EM10 Mark II and are looking for an interesting prime lens to compliment the kit lens, check this one out. Laowa is known primarily for their specialty wide angle lenses and this one is their newest and least expensive lens with generally good reviews. All metal construction, too.
Technically, this was their introductory price, but now all the major camera retailers are selling it at $179, however if bought through the manufacturer, this is still being sold at $149 with free tote bag and shipping (fast shipping too thru FedEx).
Laowa 17mm f/1.8 MFT is perfect for street, travel and everyday photography. Weighted 6oz (172g) only, this remarkably light, compact and agile lens serves as an exceptional complement to MFT cameras. It is a great tool that should be in every photographers' kit bag. The wide angle of view(65°) pair with the large f/1.8 aperture can easily handle different lighting conditions. The lens houses nine elements in seven groups and has a seven-blade diaphragm to give a traditional Sunstar rendering in out-of-focus highlights. It has a minimum focus distance of 15cm and a 46mm filter thread.