This lens is currently the widest zoom lens available for Sigma/Panasonic/Leica full frame L-mount cameras. Designed primarily for travel photography, we have managed to compress the size to the smallest in its class, less than 9.1 cm long and only 496g (1.1lb). The 102 1/2 (18mm) to 130 1/2 (10mm) angle of view provides flexibility for photographers to compose landscape or architecture photos with ease. The aperture system is carefully re-designed to produce the best sun-star renderings among all UWA lenses in the market.Features World's widest zoom lens for Sigma/Panasonic/Leica - This is currently the world's widest zoom lens for Sigma/Panasonic/Leica full frame L-mount cameras. It provides a wide range of perspective from 102 1/2 (18mm) to 130 1/2 (10mm) and it is excellent for landscape or architecture photography. Light & Compact - Designed primarily for travel photography, Venus has managed to compress the size to the smallest and lightest, less than 9.1 cm and only 496g (-1.1 lbs). So much smaller than the other similar lenses in the market but it's so much wider. 10- Stroke Sunstars - an ordinary sunstars rendering can often be a deal breaker for landscape photographers. Our new Laowa 10-18mm, however, has been carefully redesigned to incorporate 5 straight aperture blades to produce a well-defined, sharp and clean 10-stroke sunstars. 37mm Rear Filter - A photography cannot take a good landscape photo without using a