The smc Pentax DA Star 200mm for PENTAX digital SLRs provides excellence in telephoto performance with weather seals making it resistant to adverse weather conditions. It’s a favorite of fast action-chasers on the move. The tightly sealed, weather-resistant and dust-resistant construction enhances durability for use in both rainy and dusty conditions, making the DA Star 200mm F2.8 ED (IF) SDM lens a perfect companion for the weather-resistant Pentax DSLR bodies.