200mm · f/2.8
The Pentax smc DA* 200mm F2.8 ED (IF) SDM is a weather-sealed telephoto prime offering excellent sharpness, especially from f/4 to f/11, with optimal performance at f/5.6. However, it exhibits noticeable purple fringing and longitudinal chromatic aberrations at wide apertures. Build quality is superb with a metal barrel and dust/weather resistance, though autofocus can hunt in low light. It suits Pentax DSLR users seeking a compact, fast telephoto lens for general telephoto work, but those sensitive to chromatic aberrations may need to stop down.