This F1.4 50mm lens is extremely sharp, and capable of keeping up with very high resolution cameras.  A Hyper Sonic Motor (HSM) ensures quiet, smooth and accurate autofocusing and paired with Special Low Dispersion (SLD) glass and Super Multi-Layer coating. 13 elements in 8 groups allow for unsurpassed performance even at wide apertures and close-up photography is easily managed with a minimum focusing distance of 40cm.

SPECS:

Lens Construction: 13 elements in 8 groups

Angle of View: (35mm) 46.8°

Number of Diaphragm Blades: 9 (Rounded diaphragm)

Mininum Aperture: F16

Minimum Focusing Distance: 40cm / 15.7 in.

Filter Size: (mm) φ77㎜

Maximum Magnifications: 1：5.6

Dimensions: (Diameter x Length) Φ85.4mm × 99.9mm(3.4 in. x 3.9 in.)

Weight: 815g / 28.7 oz.