The Sigma EX DG 105 mm F/2.8 DG Lens features a lens coating, which cuts down ghost imaging. It is designed to reduce the influence of harmful light, caused by reflections from the digital image sensor. Its outstanding optical performance provides the ultimate correction against lateral chromatic aberration and distortion. This lens boasts compact dimensions of f/74 mm and an overall length of 95mm. The minimum focusing distance of 12.2 inches is capable of macro photography, with a maximum magnification of 1: 1. This lens is equipped with a Focus Limiter Switch, which limits the AF range, thus improving the speed and accuracy of auto focus. It also incorporates a Dual Focus system, which is designed to make the lens easy to hold during auto focusing. The large focus ring offers smooth and positive action, whilst focusing manually.