Sigma 28-105mm f/2.8-4 Aspherical IF

Sigma 28-105mm f/2.8-4 Aspherical IF is a auto focus prime zoom lens for full frame cameras.

Optical design

Bright lens thanks to the high aperture value Has 8 aperture blades, with this amount of aperture blades you will be satisfied with the result.

Physical characteristics

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. 79 mm long, requires consideration if you want to carry in the camera bag. Weights 405 grams so plan ahead, carry only if really necessary.