smc PENTAX-DA★55mmF1.4 SDM

The smc PENTAX-DA★55mmF1.4 SDM is a discontinued medium telephoto prime lens for Pentax K-mount digital SLRs, offering a 55mm focal length (84.5mm equivalent in 35mm format) and a bright F1.4 maximum aperture. It is designed for portrait photography, combining high resolution with natural, soft bokeh from its round iris diaphragm. The lens uses Anomalous Dispersion Glass and Aero Bright Coating to reduce color fringing, flare, and ghosting, and features dust-resistant, drip-proof construction, Quick-Shift Focus, and SP coating on the front element. Autofocus is driven solely by an internal SDM ultrasonic motor, and specifications include 9 elements in 8 groups, a 0.45m minimum focusing distance, a 58mm filter size, and a weight of 375g.