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The Sigma 105mm f/2.8 EX DG macro lens delivers superb, distortion-free images throughout its broad focus range, from infinity telephoto to lifesize (1:1) macro, as close as 12.2" without accessories. Its non-rotating front lens group makes it easier to work with polarizing filters. A focus limiter helps divide the broad focus range into more manageable chunks.
The "focus-free" mechanical design allows the lens to autofocus without any interference from the manual focus ring, making it easy to hold the lens without affecting the speed or normal operation of the autofocus function. Rugged mechanical construction also makes it durable enough for even the heaviest use required by professional photographers. An ideal lens for a wide variety of applications from nature photography to portraiture.
The improved DG lens design for this lens corrects for various aberrations. This macro lens is specially coated to get the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras.
Close focus capability of 12.2"
Improved minimum aperture of f/45 provides incredible depth of field
Super Multi Layer (SML) coating reduces ghosting caused by reflections from the surface of digital image sensors
Dual Focus (DF) makes the lens easier to hand hold during AF
Filter Size 58mm
f/Stop Range 2.8-45
Minimum Focus Distance 12.2" (31 cm)
Magnification 1:1
Angle of View 23.3 Degrees
Groups/Elements 10/11
Length 3.7" (95mm)
Maximum Diameter 2.9" (74mm)
Weight 15.8 oz (450 g)
