The Sigma 257-306 105mm F2.8 EX DG Macro lens for Canon SLR mount is very suitable for taking pictures in nature, while it uses natural light conditions or flash. The greater working distance of this lens is very advantageous when taking the picture of a flower among the branches or an insect. The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition. This lens would have an equivalent field of view of a 178mm telephoto macro lens on a digital SLR camera. This new medium telephoto macro lens employs a new design concept for digital SLR cameras. Its power layout produces an excellent optical performance and also reduces flare and ghost. This lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor. A screw-in hood is included, for convenient use of circular polarizing filters. It is possible to attach a 77mm filter in front of the lens hood. This lens also incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during auto focusing. The large focus ring offers smooth and positive action whilst focusing manually. Weight - 16.1 ounces (457 grams)

• Compact and lightweight medium telephoto macro lens.
• Optimized image quality for Digital SLR cameras.
• Maximum magnification of 1:1
• Focus Limiter Switch that limits the AF range so improving the speed and accuracy of auto focus
• Dual Focus (DF) system that is designed to make the lens easy to hold during auto focusing