Sigma popular macro lens , focusses to 1:1 life size at a distance so as not to scare the butterflies!

This high performance Sigma medium telephoto macro lens optimised for digital cameras. Macro 105mm F2.8 EX DG 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.
Lens Construction 11 Elements in 10 Groups
Angle of View 23.3 degrees
Number of Diaphragm Blades 8 Blades
Minimum Aperture F45
Minimum Focusing Distance 31.3cm
Maximum Magnification 1:1
Filter Size 58mm
Dimensions Diameter 74mm X Length 97.5mm
Weight 460g