Sigma 45mm f/2.8 DG DN Contemporary

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Lens Specifications
Name Sigma 45mm f/2.8 DG DN Contemporary
Image Circle 35mm
Type Wide Prime
Focal Length 45mm
APS Equivalent 1.5x: 67.5mm; 1.6x: 72mm
Max Aperture f/2.8
Min Aperture f/22
Diaphragm Blades 7 (rounded)
Lens Construction 8 elements in 7 groups
Diagonal Angle of View(Based on image circle) 51.3 degrees
Focus Details Smooth, quiet and high-speed AF via stepping motor
Front Element Rotation No
Zoom System n/a
Closest Focus 24cm / 9.4 in.
Magnification Ratio 0.25x / 1:4
Filter Size 55mm
Dimensions(Length x Diameter) 46.2mm x 64.0mm / 1.8 in. x 2.5 in.
Weight 215g / 7.5 oz.
Notes Available AF Mounts: L-Mount, Sony E-Mount
Typical Online Price US$550 (Avail. July 2019)