Pentax 21880 Operation Manual - Page 12
About lenses with a supersonic motor
UPC - 027075154407
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10 About lenses with a supersonic motor The lenses in the table below are equipped with internal supersonic motors. When mounted on a camera body that supports supersonic motors, the autofocus (AF) is quiet and smooth. • Supersonic motor compatible camera body / , , , *, * If the firmware is version 1.30 or later, refer to page 11. Lens Precautions DA 55mm f/1.4 SDM DA17-70mm f/4 AL [IF] SDM • The lens uses a supersonic motor. When the lens is mounted on a camera body that does not support supersonic motors (including the with firmware older than version 1.30), the autofocus cannot be operated by either the AF motor in the camera body or the supersonic motor. • If using the lens with the following cameras, and the power is turned on, MF appears in the monitor, but it does not interfere with AF operations. , , , DA 60-250mm f/4ED [IF] SDM DA 16-50mm f/2.8ED AL [IF] SDM DA 50-135mm f/2.8ED [IF] SDM DA 200mm f/2.8ED [IF] SDM DA 300mm f/4ED [IF] SDM When the lens is mounted on a camera body that does not support supersonic motors (including the with firmware older than version 1.30), the autofocus is operated by the AF motor in the camera body. * In both cases focusing can be done manually.