Product information "Pentax smc DA 21mm f/3.2 AL Limited Series"
The Pentax DA 21mm f/3.2 Limited Lens is an extremely thin, compact and light-weight wide angle pancake-style lens, designed exclusively for Pentax digital SLR cameras. This lens measures only 1" (25mm) long, and weighs a mere 4.9 ounces (140 grams).
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 image circle in DA-series lenses is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in Pentax digital SLR cameras to optimize camera performance. This design also contributes to a drastic reduction in size, weight and production cost, compared to 35mm-format counterparts with similar specifications.
Note!Not suitable for 35mm film SLR cameras
Limited lens-series quality for distinctive visual description and a premium appearance
Includes hybrid aspherical lens in its eighth optical element to effectively compensate for a variety of aberrations
Floating lens mechanism, designed to adjust the degree of aberration compensation in relation to the focusing distance
SP coating to protect the lens against water and grease
Minimum focusing distance of 8" (20 cm) for close-up photography
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