The PENTAX DA Star 200mm F2.8 ED (IF) SDM is the fastest telephoto lens in Pentax’s high-end product range. For example, on an APS-C like the Pentax K5, its focal length is equivalent to a 300mm on a full-frame camera. With its weather- and dust-resistant construction and fast ultrasonic autofocus, it could prove a great companion for wildlife and sports photographers.
Pentax also included three extra-low dispersion (ED) elements to deal with chromatic aberration, so let’s see how the PENTAX DA Star 200mm F2.8 ED performs in term of image quality.
The strong points of the Pentax DA Star 200mm F2.8 ED (IF) SDM:
The questionable point of the Pentax smc DA Star 200mm F2.8 ED (IF) SDM:
Comparison at F=200mm:
The advantages of Pentax smc DA Star 200mm F2.8 ED (IF) SDM:
The advantages of the Pentax smc PENTAX DA 50-200mm F4-5.6 ED: