出典:Wikipedia
出典:『Wikipedia』 (2011/02/28 17:24 UTC 版)
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. However, the autofocus accuracy varies by camera body and is not especially fast.