Mounts directly to your Pentax DSLR camera - no additional adaptors required</br>Compact and lightweight</br>Aspherical type lens provides clear and sharp images</br>Aperture Range: F1.4 - 16</br>28.3 degree angle of view</br></br>Product Description</br></br>The Rokinon 85mm f/1.4 Manual Focus Lens for Pentax is an ultra-bright lens with a maximum aperture of f/1.4. Although you can only use this lens in manual focus mode?? it is fully compatible with the automated features available with digital SLR cameras. It is compact and lightweight?? and offers the ideal focal length and bright aperture for use as a portrait lens.</br><br/>http://www.amazon.com/gp/product/B0025F4AWW