Sigma 20mm F1.8 EX DG Aspherical RF

Wideangle prime lens | Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha
Principal specifications
Lens type Prime lens
Max Format size 35mm FF
Focal length 20 mm
Image stabilisation No
Lens mount Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha
Aperture
Maximum aperture F1.8
Minimum aperture F22.0
Aperture ring Yes
Number of diaphragm blades 9
Optics
Elements 13
Groups 11
Special elements / coatings 2 aspherical elements
Focus
Minimum focus 0.20 m (7.87)
Autofocus Yes
Full time manual Yes
Focus method Rear
Focus notes dual focus mechanism
Distance scale Yes
DoF scale Yes
Physical
Weight 520 g (1.15 lb)
Diameter 89 mm (3.49)
Length 90 mm (3.52)
Colour Black
Filter thread 82 mm
Hood supplied Yes
Hood product code petal type hood
Tripod collar No
Other
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