APS-C sized imageLenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either. No Ultrasonic AFLenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses. No stepping motor AFLenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses. One or more Low Dispersion lens element is usedLow Dispersion lens elements help to reduce chromatic aberration. Not stabilizedImage stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule. |
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Designed for exclusive use with PENTAX KAF-mount digital SLR cameras, the new lens offers 4X zoom coverage in the telephoto range. Further, the lens features an angle of view from 31.5 degrees to 8.1 degrees (equivalent in focal length from 76.5mm to 306mm in the 35mm format). As with all DA-Series lenses, this DA 50mm-200mm 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 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 is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in PENTAX digital SLRs to optimize 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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Available mount(s) | Pentax K |
Application(s) | Portrait, Landscape, Wildlife |
Category(s) | Tele zoom |
Multiplier | 1.5× |
Stabilizer | no |
Focal length | 50 - 200 mm (4× zoom) |
Lens construction | 11 elements in 10 groups |
Angle of view |
35mm: N/A digital: 31.5-8.1° |
Number of blades | 6 |
Maximum aperture | wide: f/4 tele: f/5.6 |
Minimum aperture | wide: f/22 tele: f/32 |
Minimum focusing distance | 110 cm |
Magnification | N/A |
Filter size | 52 mm |
Size | ∅ 66.5 × 78.5 mm |
Weight | 260 g |
Notes |
Aperture control: Automatic, Metering system: TTL open-aperture metering |
AF speed | N/A |
AF sound | |
Internal focusing | N/A |
Internal zoom | N/A |
Fix front lens | N/A |
Mount type | N/A |
Weather sealed | N/A |
Drop in filter | N/A |
Ultrasonic AF | no |
Stepping motor AF | no |
APS-C sized circle | yes |
Low dispersion lens element | yes |
Hard case | N/A |
Soft case | N/A |
Lens hood |
PH-RBB52 (included) printable lens hood |
Tripod adapter | N/A |