The unique smc PENTAX-FA 31mm F1.8 AL Limited lens of/ers exceptionally high image quality and, when used on a PENTAX DSLR, a perspective similar to that of the human eye. It incorporates a glass-moulded aspherical lens element into its 9-element, 7-group optics, and of/ers sharp, crisp image reproduction, even at the maximum aperture of F1.8. It features a beautiful aluminium body and comes equipped with a flower-shaped lens hood.Focal length of 31mm for opening up ne.w possibilities in wide-angle expression. This lens uses glass moulded aspherical and high-reflection, low dispersion lenses together with a large aperture of F1.8 for sharp imaging performance with natural perspective and high contrast, and the floating lens system allows proper imaging performance at all shooting distances for providing exceptional image quality for every situation. A flower-shaped hood is also integrated in the design for easy operation of circular polarising filters.- This lens incorporates a glass-moulded aspherical lens element to minimise spherical aberrations.- Sharp, crisp image reproduction, even at the maximum aperture of f/1.8- Non-rotating front lens element- Built-in lens hood- The thin, lightweight design makes it an ideal carry anywhere lens- The versatile angle of view produces natural images with a moderate perspective or an expanded depth of field, making it ideal for many different types of subjects and occasions, from snapshots to landscapes to architecture- The limited lens series quality of/ers distinctive visual appeal and a premium appearance with its polished metal design- Developed for Pentax film SLR cameras, however full-frame optics are also compatible with Pentax digital SLR camerasSpecifications:Performance- Focal Length: 31mm- Comparable: APS-C Focal Length: 46.5 mm- Aperture:Maximum: f/1.8Minimum: f/22- Lens Mount: Pentax K- Format Compatibility:35mm Film / Full-Frame Digital SensorPentax Digital (APS-C)- Angle of View: 70- Minimum Focus Distance: 1' / 30.48 cm- Maximum Magnification: 0.16x- Maximum Reproduction Ratio: 1:6- Optical Design: 9 Elements in 7 Groups- Diaphragm Blades 9- Image Stabilisation: No- Autofocus: Yes- Tripod Collar: NoPhysical- Filter Thread: 58 mm- Dimensions (DxL): 6.60 x 6.86 cm- Weight: 346 gIn the box:- Pentax smcP FA 31mm f/1.8 Limited Lens (Silver / Black)- Front & Rear Lens caps- Case