Designed for combination with relatively small full-frame mirrorless cameras, this standard lens pursues easy operability as a regular prime lens by balancing its easy-to-carry size and high optical performance, thereby embodying the Contemporary line's development concept of “pursuing optimum balance," and becoming the perfect first lens in the lineup dedicated for full-frame mirrorless cameras. About Product Name: Product name includes “DG” when the lens is designed to deliver the ultimate in performance on cameras with full-frame sensors, and “DN” when the lens design is optimized for mirrorless cameras with the short flange focal length. Lens construction 8 elements in 7 groups Angle of view (35mm) 51. 3° Number of diaphragm blades 7 (Rounded diaphragm) Minimum aperture F22 Minimum focusing distance 24cm / 9. 4in. Maximum magnification ratio 1:4 Filter size φ55mm Dimensions (diameter x length) φ64. 0mm×46. 2mm / φ2. 5in. × 1. 8in. Weight 215g / 7. 5oz. All figures calculated by L-Mount. Appearance and specifications are subject to change without notice.