Quick-shift Focus System for instant switching from auto focus to manual focus
This is a fast high-performance DA* series lens. Its ultrasonic focus assures extremely fast and silent operation. High-quality extra-low dispersion glass, ED lens, elements provide for absolutely brilliant image quality.
Ultrasonic motor is used in the lens for providing an "SDM" mechanism that enables quiet and smooth autofocus operation. (AF driving by the internal camera motor is also supported.) The lens components are sealed for enabling a dust-resistant and drip-proof construction that prevents the entry of water and dust into the lens. An inner focus optical system is used for correcting various types of aberrations over the entire shooting range. SP (super protect) coating for protecting the lens front surface from water and dirt Quick-Shift Focus System for enabling manual focus operation after focusing by AF without any switching operation.