Best lenses for the Olympus OM-D EM-10: Wide-angle primes and telephoto zooms - DXOMARK
Zuiko wideangle lenses at 35mm focal length
Olympus M.Zuiko Digital ED 8-25mm f/4 PRO Lens V313030BU000 B&H
Guide to Classic Olympus OM Zuiko lenses on film and Sony Full Frame - phillipreeve.net
Buy M.Zuiko Digital ED 9-18mm F4.0-5.6 From OM SYSTEM USA
Olympus OM Zuiko Auto-W 28mm f2.8 Wide Angle Prime Lens - Victory Camera
Amazon | Olympus Zuiko Digital - Wide-angle zoom lens - 9 mm - 18 mm - f/4.0-5.6 ED - Four Thirds - for Olympus E-3, E-30, E-410, E-420, E-450, E-520, E-600, E-620,
Olympus M.Zuiko Digital ED 12mm f/2.0 Wide-Angle Lens for Most Micro Four Thirds Cameras Silver V311020SU0 - Best Buy
Olympus 12mm f/2.0 Wide-Angle Lens for Select Digital Cameras Black V311020BU001 - Best Buy
Backscatter M52 Wide Angle Air Lens for Olympus TG Series - The Scuba Doctor Dive Shop - Buy Scuba Diving, Snorkelling, Spearfishing and Freediving Gear from Australia's best online dive retailer
Olympus M.Zuiko Digital - wide-angle lens - 17 mm - V311050BU000 - Camera & Video Accessories - CDW.com