Sigma 28mm f/1.8 Aspherical High-Speed

Sigma 28mm f/1.8 Aspherical High-Speed is a auto focus wide angle lens for full frame cameras.

Optical design

Has 7 aperture blades, mid-grade lenses usually have this amount of blades. Having rounded blades provides out of focus circle shape closer to a circle. Wide open, subjects located outside the depth of field are shown very blurred.

Physical characteristics

69 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 58 mm commonly filter size, provides a range of filter options. Weights 350 grams so plan ahead, carry only if really necessary.