Professional photographer and expert reviewer checks out Sigma's classy fisheye optic A wide aperture diagonal fisheye for APS-C sensor cameras, which offers an angle of view of 180 degrees from corner to corner.
Excellent resolution when stopped down; Good resolution in the centre at f/2.8; Chromatic Aberrations kept to acceptable levels; Build Quality; Silent focus motor
Curved hood makes lens difficult to place down without lens caps