Weather-resistant design with 8 sealing points for weather- and dust-resistance and operation as low as 14 Degree. Inner focus system with 0.08 seconds autofocus speed and nearly silent operation. Focal length : 35mm (35mm format equivalent : 53mm) Nano-GI coating reduces ghosting and flare. 9 blade aperture creates smooth and circular bokeh. Minimum working distance of approximately 13 inches.Angle of view:44.2°