For this review, the lens was tested on a Panasonic Lumix G9 using Imatest. Distortion measures -1.43% barrel at 10mm, changing to minimal pincushion at 12mm (+0.09%), 18mm (+0.05%) and 25mm (+0.03%).
The Panasonic Lumix DMC-ZR1 ... the ZR1's sensor to a Leica DC Vario-Elmar branded 8x optical zoom lens which offers focal lengths spanning the range from a generous 25mm-equivalent wide angle ...
Reviews / Panasonic Leica DG Vario-Summilux 10-25mm f/1.7 ASPH Lens Review - Verdict ...