Weather and dust resistant, it's the perfect lens for extreme weather conditions. Developed specifically for PENTAX digital SLRs, the DA* 300mm ED (IF) SDM lens has PENTAX SP coating which ...

f/22 should be avoided as its sharpness is poor, but then we probably rarely want to use a 300mm lens at f/22. CA (Chromatic Aberration) is actually very acceptable and although some fringing is ...