Sigma 18-50mm F2.8-4.5 DC OS HSM

Announced Mar 3, 2009 •
Zoom lens | Canon EF, Pentax KAF3, Sony/Minolta Alpha, Sigma SA Bayonet, Nikon F (DX)
Principal specifications
Lens type Zoom lens
Max Format size APS-C / DX
Focal length 18–50 mm
Image stabilisation Yes (4 stops claimed)
Lens mount Canon EF, Pentax KAF3, Sony/Minolta Alpha, Sigma SA Bayonet, Nikon F (DX)
Aperture
Maximum aperture F2.8 - F4.5
Minimum aperture F22.0 - F36.0
Aperture ring No
Number of diaphragm blades 7
Optics
Elements 16
Groups 12
Special elements / coatings 2 SLD glass elements 3 aspherical elements
Focus
Minimum focus 0.30 m (11.81)
Maximum magnification 0.24×
Autofocus Yes
Motor type Ultrasonic
Full time manual No
Focus method Internal
Focus notes AF will not function with Pentax camera bodies that do not support HSM
Distance scale Yes
DoF scale No
Focus distance limiter No
Physical
Weight 395 g (0.87 lb)
Diameter 74 mm (2.91)
Length 89 mm (3.49)
Materials Metal mount
Sealing No
Zoom method Rotary (internal)
Filter thread 67 mm
Filter notes Does not rotate on focusing
Hood supplied Yes
Tripod collar No
Other
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