SIGMA 28mm f1.8 EX DG Aspherical Macro lens has a fast F1.8 maximum aperture, with macro-focusing capability. It features minimum focusing, down to 20cm/7.9inches (reproduction ratio 1: 2.9). The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus image. It incorporates the floating focus system and the use of two aspherical lens elements to minimize distortion, spherical aberration and astigmatism. The lens incorporates minimum vignetting optical construction in order to obtain adequate peripheral brightness with open aperture. Internal focus system of the lens eliminates front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The lens also incorporates a dual-focus mechanism. It is easy to hold the lens, since focusing ring does not rotate during auto-focus, and yet provides adequate torque of the focusing ring during manual focusing of the lens. The lens materials used in this new lens are lead and arsenic free ecological glass.
Product Identifiers
Brand
Sigma
MPN
440110
UPC
0085126440404
Model
DG Aspherical Macro
eBay Product ID (ePID)
101742850
Product Key Features
Mount
Sigma SA
Focal Length
28mm, Fixed/Prime
Compatible Brand
Sigma
Maximum Aperture
f/1.8
Series
Sigma EX
Type
Macro/Close Up
Focus Type
Auto & Manual, Fixed/Prime
Dimensions
Weight
16.93 Oz
Additional Product Features
Aperture
f/1.8
Min Aperture
22
Additional Tech Characteristics
Asp EX Dg
Diameter
3.3in.
Focal Length (mm)
28mm
Camera Type
SLR
Product Line
Sigma EX
Best Selling in Lenses
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Best Selling in Lenses