Panasonic Leica DG Vario-Summilux 10-25mm F1.7 ASPH. Lens

The LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. is a constant F1.7 wide zoom that replaces a bag of fast primes. It is a Micro Four Thirds lens, so the 10 - 25mm focal length frames like 20 - 50mm on a 35mm camera, and the optical formula runs 17 elements in 12 groups (3 aspherical, 4 ED, 1 UHR). It is built to the Leica DG optical standard Panasonic applies to its higher-tier glass.

Maximum aperture is F1.7, closing to F16, the diaphragm has 9 blades in a circular iris, and it focuses to 0.28m. Maximum magnification is 0.14x (0.28x, 35mm equivalent), the filter thread is 77mm, and the lens measures 87.6mm max diameter x approx. 128mm length at approx. 690g (excluding caps and hood). A physical aperture ring is fitted.