This is the Olympus M.Zuiko Digital ED 40-150mm f/4-5.6 telephoto zoom lens.
Sample Photos
Full-resolution photo samples — Look for full-size sample pictures in this Japanese-language Olympus E-PL1s review at dc.watch.impress. Comparison tests are made with this lens (photos are on the left in all comparisons) and the normal Olympus ED 40-150mm (non-M mount) lens. The reviewer notes that the new M.Zuiko 40-150mm is comfortable to operate and works smoothly, allowing for real-time focus override by simply turning the focusing ring.
Accessories and add-ons
The filter thread size on the M40-150mm is 58mm, which means you’ll want to be looking at purchasing 58mm filters.
Lens Case LSC-0814 for Zuiko Digital Lens.
Resources
Official Olympus M.ZUIKO 40-150mm page at Olympus America.
Related
Olympus lenses — Main page