http://www.pentaximaging.com/footer/news_media_article?ArticleId=6458799
GOLDEN, CO (March 15, 2005)...PENTAX Imaging Company has announced yet another
compact, lightweight, interchangeable zoom lens for exclusive use with PENTAX
digital SLR cameras including the *ist D and the *ist DS digital SLRs. The smc
PENTAX-DA 12mm-24mm F4 ED AL [IF] is the sixth DA-series lens offered by the
photo manufacturer. The PENTAX-DA 12mm-24mm F4 ED AL [IF] will feature:
2X zoom coverage in the ultra-wide angle range with an angle of view from 99
degrees to 61 degrees (equivalent in focal length from 18.5mm to 37mm in the
35mm format) when mounted on the PENTAX *ist D or *ist DS digital SLR camera
body
13-element/11-group optical construction incorporating ED (Extra-low
Dispersion) and aspherical optical elements
The compact dimensions (diameter x length) of 3.3� x 3.4� (83.5mm x 87.5mm)
With Extra-low Dispersion (ED) glass lens element and two aspherical lens
elements, the lens offers more true-to-life image reproduction. 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 SLRs to optimize camera performance.
The new design also contributes to a drastic reduction in size, weight and
production cost, compared to 35mm-format counterparts with similar
specifications.
