Through the eyes of unrelated twins: Comparing the M.Zuiko 17mm F1.8 with the Leica 15mm F1.7 - Olympus Passion
Amazon.com : OM SYSTEM OLYMPUS M.Zuiko 17mm f1.8 (Silver) for OM SYSTEM OLYMPUS and Panasonic Micro 4/3 Cameras - International Version (No Warranty) : Camera Lenses : Electronics
Panasonic LUMIX G 25mm F1.7 ASPH Micro-Four-Thirds mount lens review: Attractive option - DXOMARK
Amazon.com : OM SYSTEM OLYMPUS M.Zuiko 17mm f1.8 (Black) for Olympus and Panasonic Micro 4/3 Cameras - International Version (No Warranty) : Camera Lenses : Electronics
Michael's TechBlog: April 2021
Sigma 17mm f4 DG DN Contemporary Review L Mount - Finding Range
The Panasonic Lumix G 20mm f/1.7 II ASPH Lens Review — Tools and Toys
TTArtisan 17mm F1.4 APS-C Manual Focus Prime Lens For Sony E a6000 FUJI XF XT1 XS10 Canon ef-m Panasonic Olympus M43 NikonZ - AliExpress
Amazon.com : OM SYSTEM OLYMPUS M.Zuiko 17mm f1.8 (Black) for Olympus and Panasonic Micro 4/3 Cameras - International Version (No Warranty) : Camera Lenses : Electronics