Like all current DA lenses, the SMC Pentax DA* 50-135mm is designed only for Pentax APS-C DSLR cameras. It was announced in late February, 2007. It auto-focuses with an SDM ultrasonic motor on the K10D (firmware 1.30) and newer cameras. On older cameras the lens will auto-focus with the ‘screw drive’ mechanism.
Pentax SMC Pentax-DA* 50-135mm F2.8 ED [IF] reviews: Lens
![Pentax SMC Pentax-DA* 50-135mm F2.8 ED [IF]](https://images.reevoo.com/products/10417/10417423/original.png?fingerprint=8fcf4caccb67333f18841883504d818937bb5329)
Like all current DA lenses, the SMC Pentax DA* 50-135mm is designed only for Pentax APS -C DSLR camera...
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