This super-wide-angle lens is ensured minimal light-fall-off with superior peripheral brightness. The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background. This is an ideal DG lens optimized Digital SLR camera.The minimum focusing distance of this lens is 20cm (7.9 inch) and it has maximum magnification of 1: 4 with fast F 1.8 maximum aperture. The minimum focusing distance of 20cm (7.9 inch) and 94.5¡ angle of view allow close up photography surrounding the photographic subject.The lens incorporates Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. The rear focus system eliminates the need for the front of the lens to rotate, thus allowing the use of a "Petal-type hood", which is superior light blocking effect.The use of aspherical lens elements in both of the front and rear lens groups effectively compensates for distortion, spherical aberration and astigmatism.
Product Identifiers
Brand
Sigma
MPN
411101
UPC
0085126411275
eBay Product ID (ePID)
219538060
Product Key Features
Mount
EF Mount
Focal Length
Fixed/Prime, 20mm
Maximum Aperture
f/1.8
Series
Sigma EX
Type
Wide Angle
Focus Type
Auto & Manual, Fixed/Prime
Dimensions
Weight
18.34 Oz
Additional Product Features
Aperture
f/1.8
Compatible Brand
Canon
Min Aperture
22
Additional Tech Characteristics
Dg EX RF Asp
Diameter
3.5in
Focal Length (mm)
20mm
Camera Type
SLR
Camera Technology
Digital
Product Line
Sigma EX
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