Standard lens featuring superb quality and portability. Two high-refraction lens elements and new Gaussian optics eliminate astigmatism and suppress astigmatic difference. Crisp images with little flare are obtained even at the maximum aperture.
features: Two high-refraction lens elements 50mm focal length 1:1.4 maximum aperture 46° diagonal angle of view 0.45m / 1.5 ft. closest focusing distance.