The Pentax D FA 100mm F2.8 Macro WR Lens  is constructed with an aluminum housing and 6 weather seals so you can shoot in almost any environment without risking internal damage to the lens.Optimized for DSLRs and compatible with film SLR cameras.
Optical elements are treated with the Pentax Super Protect multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images. Plus, the configurations of its optical elements produce crisp, sharp images with no flare and ghosting. It also features a "Quick Shift" focusing system which allows you to easily switch between manual and AF modes.
Achieving life-size (1:1) magnification, this macro lens is ideal for the close-up photography including, but not limited to, nature, technical, medical or product applications. It is also great for portraiture. Its 8 rounded diaphragm blade configuration assists in producing out-of-focus areas of your images with a pleasing look.
The smc Pentax-D FA 100mm f/2.8 WR macro is designed for digital and film SLR cameras. The aluminium construction with weather resistant seals means you can get the picture whatever the weather. It utilizes curvature and positioning of optical elements to virtually eliminate flare and ghosting for clear, high-quality images particularly important to digital photography. This versatile lens can also be used a telephoto lens and is excellent for portraits. Achieving life-size (1:1) magnification it features our acclaimed multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images.
Rounded diaphram blades
"Quick shift" focus system
Super Protect lens coating