The SMC Pentax DA 50-200mm f/4-5.6 ED WR Lens is a medium-range 4X telephoto zoom, designed for exclusive use with PENTAX KAF-mount digital SLR cameras. This DA 50-200mm zoom 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.
This lens boasts a simple, functional design, is weather sealed plus has a SP (Super Protect) coating to keep the lens free of grease, dust and other elements which could impact lens function and image quality. This lens also features 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 23.5 x 15.7mm size of the CCD used in PENTAX digital SLRs to optimize camera performance.
- Weather Resistant
- SP (Super Protect) Coating Repels Dust, Water and Grease
- 4X Zoom Coverage in the Telephoto Range
- Quick-Shift Focus System for Instant Auto to Manual Focusing
- Extra-Low Dispersion (ED) Glass Lens Element
- Two Aspherical Lens Elements for Superior Sharpness
- Minimal Chromatic and Spherical Abberation
- Simple, Functional Design
- Equivalent to 75-300mm in the 35mm Format
An updated version of the Pentax 50-200mm, this new telephoto zoom continues to feature an ED glass element for top optical quality, but with an improved construction. The build is excellent including a metal lens mount, smooth zoom and focus rings and a water resistant coating that makes it an ideal partner for Pentax D-SLRs featuring weather seals like the new K7. There’s even a little access window in the lens hood to rotate a circular polarising filter, which is a nice touch, and focus distance markings on the barrel, something you don’t often see on zooms. The finish is good too, using a more refined mottled black plastic with rubber studs on the zoom and focus rings. The top marks don’t continue on the performance however. There’s no AF/MF switch for switching between modes and the AF is generally noisy with a tendency to hunt a bit, particularly in low-contrast conditions.