Sigma AF 15mm f/2.8 EX Fisheye

The Sigma AF 15mm f/2.8 EX Fisheye is a camera glass that can capture ultra-wide angle photos. It has autofocus capabilities and can be used with full frame cameras. The lens has a maximum aperture of f/2.8, which means it can capture bright and sharp images even in low light conditions. The lens has a total of 7 aperture blades, which is typical for mid-grade lenses, and provides a circular out of focus effect. The lens has a length of 63mm and weighs 370 grams, so it may not be the most portable option for carrying around. The lens is made up of multiple lens elements and has a lens coating to reduce flare and ghosting. The build quality of the lens is good and it can produce high-resolution images. Overall, the Sigma AF 15mm f/2.8 EX Fisheye lens is a good option for those looking for an ultra-wide angle lens with autofocus capabilities. However, there are other alternatives available in the market.

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. Bright lens thanks to the high aperture value

Physical characteristics

Weights 370 grams so plan ahead, carry only if really necessary. 63 mm long, this small lens should be always in the camera bag.