Sigma AF 18mm f/3.5

Sigma AF 18mm f/3.5 is a auto focus wide angle lens for full frame cameras.

Optical design

Average brightness in this league Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.

Physical characteristics

59 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 72 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. Weights 355 grams so plan ahead, carry only if really necessary.