The optical design includes both extra-low dispersion and extra refractive index elements, which help to suppress chromatic and spherical aberrations for a high degree of clarity, color accuracy, and sharpness. Manual focus control permits focusing from 1.5' to infinity, and the front of the lens has a built-in LED ring light to aid in focusing at close distances. The slim 0.2" diameter of the front of the lens barrel also offers greater opportunities for lighting subjects from the front. Additionally, the front portion of the lens is waterproof, and permits working with subjects just beneath the surface of water or in other dusty or trying environments.
Slim 0.8" front diameter allows performing unique "slide-in" shots as well as affords a greater range of close-up, inconspicuous shooting opportunities. The smaller front diameter also makes it easier to illuminate close-up subjects from the front.
The front of the lens is also waterproof, allowing you to comfortably work just under the surface of water or in dusty environments.