Sigma EX 17-50mm f2.8 DC OS USM for Canon EF boom When you look inside

When you look inside

Not much else to it

It has Nikon's Matrix metering system (including 3D Matrix with D-type lenses) and shutter speeds from 30s to 1/8000s

plus an #035 Superclamp

with smooth focusing

Sigma EX 17-50mm f2.8 DC OS USM for Canon EF boom When you look insideThe Sigma EX 17 50mm f2. 8 DC OS USM for Canon EF S mount offers a versatile zoom range from wide angle to short tele combined with a fast f2. 8 constant aperture. Built in image stabilization allows handheld use in a wide range of difficult lighting conditions. This is a lens for APS C sensor sized Canons, and won't work with full frame EF cameras. Clean glass, excellent functionality. Great cosmetic condition with only minor wear from use.