Sigma 10-20mm f/4-5.6

Focusing distance: 24cm / 9.4in
Magnification: 0.15x
Filter size: 77mm
Lens size: ø83.5mm x 86.4mm / ø32.9in x 34in
Weight: 495g / 17.5oz
Construction: 14 elements in 10 groups
Accessories: Case, Petal-type Hood

Eddie's take on it

An APS-C lens ported to Four Thirds, it is outclassed in every possible way by the Olympus 9-18mm. There is absolutely no reason to get this lens over the 9-18mm or the 11-22mm.