Sigma AF 28-105mm f/3.8-5.6 UC-III Aspherical IF

The Sigma AF 28-105mm f/3.8-5.6 UC-III Aspherical IF is a camera glass that can be used on full frame cameras. It has a zoom range of 28-105mm, which makes it a versatile alternative to other lenses. The lens has an autofocus feature, but it can also be used manually. It has aspherical lens elements that help to reduce distortion and improve resolution. The lens coating helps to reduce glare and improve contrast in photos. The lens was manufactured some time ago, so it may not be the latest model available. The aperture ranges from f/3.8 to f/5.6, which means it can be used in low light situations, but may not produce the best bokeh. The build quality is decent, but not as durable as other lenses. The resolution of the photos taken with this lens is good, but not as sharp as other lenses with higher quality glass.

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.

Physical characteristics

72 mm long, requires consideration if you want to carry in the camera bag. Weights 283 grams so consider putting to your camera bag. With a lens filter diameter of 62 mm you are one step from the next standard filter size, buy step-up ring and bigger filter you may want to use a step-up ring and 67 or 77mm filter.