The Sigma 105mm F2.8 EX DG OS macro allows greater working distance between the lens and subject. High contrast and excellent image quality are made possible in all shooting ranges. This macro lens is ideal for digital SLR cameras as well as film SLR cameras. The Sigma 105mm features a new lens power layout producing an excellent optical performance and also reduces flare and ghosting. This new lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor.This lens is ideal for taking pictures of nature because it enables you to use natural light conditions and due to the greater working distance means you will not frighten any wildlife or insects. The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition.