Pixivkrfx

This Sigma 15mm f/18 is an optically superb lens, but it's also much bigger and heavier than similar fixed lenses like the superb Nikon 35mm f/18 DXThe 15mm zoom range only works out to be equivalent to about 2855mm on fullframe;While the aperture value of prime lenses is superior to zoom lenses, their field of view is always the same, and therefore it was always necessary to carry many fixed focal length lenses SIGMA 15mm F18 DC HSM is a new generation lens that can deliver images at f18 aperture throughout its focal lengthNot exactly more useful than a fixed lens 1 Sigma 18-35mm f/1.8 dc hsm art lens for canon