Sigma AF 18mm f/3.5

The Sigma AF 18mm f/3.5 is a camera glass that provides a wide angle view for full frame cameras. It has autofocus capabilities and can also be manually focused. The lens is made up of multiple glass elements and has a lens coating to reduce glare and improve image quality. The build quality is good and the lens has a solid feel to it. The aperture of the lens is f/3.5 which is average for this type of lens. The resolution of the lens is good and provides sharp images. There are alternative lenses available in the market, but this lens is a good option for those looking for a wide angle lens. The manufacturing time of this lens is not specified. The bokeh produced by this lens is decent, but not the best. Overall, the Sigma AF 18mm f/3.5 is a good option for those looking for a wide angle lens for their full frame camera.

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.