- Fixed input-light power simplifies the handling
- SDM focusing, fast and quiet
- Quick-Shift Focus System
- Dirt-repellent SP Coating
With this lens to the middle and upper class approach to in the standard zoom lenses in the PENTAX system. The smc PENTAX-DA 17-70 mm F4 AL [IF] SDM is designed as a lens with SDM drive. The advantage is the faster and quieter focusing. On the mechanical focus drive has been omitted here, so older cameras (*'s series, K100 and K110D and older) are not compatible).
Among many other details, it features an internal focusing.