Abe's of Maine offers the Sigma 30mm f/2.8 EX DN Lens for Panasonic and Olympus Digital Cameras, model no. 330963, for $199. Coupon code "dealnews12" drops it to $187. With free shipping, that's the lowest total price we could find by $9. Designed for mirrorless interchangeable lens cameras, this lens features a lens construction of seven elements in five groups, a seven blade diaphragm, and more.