Pentax Lens 16-45mm f/4 ED AL DA
Pentax SMC-ED DA 16-45 mm f/4-f/22 digital lens unit.
| Focal length range |
16 - 45 mm |
| Equiv. FOV (*ist D) |
24 - 68 mm |
| Maximum aperture |
F4 constant |
| Minimum aperture |
F22 |
| Construction |
13 elements in 10 groups |
| Minimum focus distance |
0.28 m (0.92 ft) |
| Maximum magnification |
0.26x |
| Filter diameter |
67 mm |
| Dimensions (dia x len) |
72 x 92 mm (2.8 x 3.6 in) |
| Weight (no hood) |
365 g (12.9 oz) |
Compatible Accessories
The compact, high-performance, interchangeable SMC Pentax DA 16mm-45mm f/4 ED AL lens features a three-times zoom ratio with focal lengths covering ultra-wide to moderate-telephoto ranges for the angle of view equivalent to 24.5mm-69mm in the 35mm format.
The DA-Series Lens lens features a responsive Quick-Shift Focus System that allows photographers to instantly switch the focus mode from auto to manual with a slight twist of the focus ring. Coupled with a simple, functional design and the elimination of an aperture ring, this new mechanism considerably improves the camera's operability. The lens also incorporates an Extra-low Dispersion (ED) glass lens element and two aspherical lens elements for true-to-life image reproduction and overall size reduction. The image circle in DA-series lenses, including the SMC Pentax DA 16mm-45mm f/4 ED AL, is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in Pentax digital SLRs, optimizing camera performance.
The new design also contributes to a drastic reduction in size, weight and production cost, compared to 35mm-format counterparts with similar specifications.
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