- Source: Pentax DA* 55mm lens
The smc Pentax-DA* 55mm f/1.4 SDM lens is a professional prime lens for the Pentax K-mount. It is designed for portrait use with a 35mm equivalent focal length of 82.5mm. The lens features weather sealing, an SDM ultrasonic motor for quiet autofocus, and has 9 rounded diaphragm blades for smoother bokeh. Autofocus speed is similar to an equivalent screwdrive lens.
References
External links
Media related to SMC Pentax-DA* 55mm F1.4 SDM at Wikimedia Commons
SMC Pentax-DA* 55mm f/1.4 SDM
Bojidar Dimitrov's Pentax K-Mount Page: DA* 55/1.4 SDM