Product Overview
Panasonic LEICA DG VARIO-SUMMILUX 25-50mm F1.7 ASPH. is a high-end standard-mid-telephoto zoom lens designed for the micro-four-thirds system. Panasonic boasts the lens' f/1.7 maximum aperture as the first in telephoto zoom lenses in the world, though the fact that the MFT system has a 2x crop factor makes this an easier feat to achieve.
The LEICA DG VARIO-SUMMULUX 25-50mm is designed to pair with the 10-25mm F1.7 to cover most common focal lengths, with it covering the 35mm full-frame equivalent focal lengths of 50-100mm.
As the Leica name attests, this lens emphasizes optical performance above all. Hence, it is relatively bulky at 654 grams and requires 77mm filters. For this price, the photographer gets a highly-corrected lens with minimal optical aberrations and best-in-class resolution.
Another highlight is the lens' focus ring, which also acts as an AF-MF switch.
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