Featuring the newest Hd coating, round iris diaphragm, and weather-resistant construction, this single lens enables shooting from the wide angle to medium telephoto ranges.This lens covers the range from wide angle to medium telephoto and provides a natural perspective that is close to the view of human eye. This 2X lens is suitable for day-to-day use that supports a wide range of photography, including landscapes and portraits. As would be expected from the newest lens, it features sharp, detailed imaging with a soft rendering effect. This lens has a weather-resistant construction, and it can be used to configure the ideal photography system by combining with dust-resistant, weather-resistant Pentax digital Slr cameras.hd coatingThis coating reduces the reflection rate up to 50% more than the conventional coating (compared to Pentax multicoating) for reduced flare and ghosting even under backlighting and other adverse conditions where strong point light sources can enter the lens.