Sigma 20mm f/1.8 EX DG Aspherical RF

Lens Reviews / Sigma Lenses i Not yet tested
Lens Specifications
Name Sigma 20mm f/1.8 EX DG Aspherical RF
Image Circle 35mm
Type Wide Prime
Focal Length 20mm
APS Equivalent 1.5x: 30mm; 1.6x: 32mm
Max Aperture f/1.8
Min Aperture f/22
Diaphragm Blades 9
Lens Construction 13 elements in 11 groups, including 2 aspherical elements
Diagonal Angle of View(Based on image circle) 94.5 degrees
Focus Details Internal (Rear Focus) with Dual Focus mechanism
Front Element Rotation No
Zoom System n/a
Closest Focus 20cm / 7.9 in.
Magnification Ratio 0.25x / 1:4
Filter Size 82mm
Dimensions(Length x Diameter) 89.5mm x 88.6mm / 3.5 in. x 3.5 in.
Weight 520g / 18.3 oz
Notes Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax
Typical Online Price US$399.00