 With newly developed, high-performance optics, this new lens measures only one inch (25 millimeters long) and weighs a mere 4.9 ounces (140 grams). Mounted on a PENTAX digital SLR camera body, the lens protrudes very little from the camera?s front panel, making it an ideal choice for carry-everywhere, instantaneous snapshot photography. This versatile angle of view produces natural images with a moderate perspective and an expanded depth of field (or a wide in-focus area), making it ideal for many different types of subjects and occasions, including snapshots, landscape, travel photos, and architecture. The DA 21mm incorporates a hybrid aspherical lens in its eighth optical element to effectively compensate for a variety of aberrations, which cause adverse effects on overall image quality. In order to assure high-quality image reproduction over the entire focusing range, it also features a floating mechanism, which is designed to adjust the degree of aberration compensation in relation to the focusing distance. Designed for Digital Lens Mount:: PENTAX KAF mount
Lens Construction:: 8 elements in 5 groups
Angle of View:: 68 degrees (when used with *istD series & K100D body)
Aperture Control:: Automatic
Number of Diaphragm Blades:: 7
Minimum Aperture:: F22
Metering System:: TTL open-aperture metering
Minimum Focusing Distance:: 0.66 ft. (0.2m)
Filter Size:: 43mm or 49mm
Maximum Magnification:: 0.17X
Dimensions:: 2.5" x 1.0" (63mm x 25mm)
Weight:: 4.9 oz. (140g) without hood; 5.5 oz. (155g) with hood
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