Pentax announces new 17-70mm f4 lens
Pentax announces new DA 17-70mm f4 AL SDM lens
Pentax has announced the release of the Pentax SMC DA 17-70mm f4 AL SDM lens for Pentax digital SLR cameras. First shown at PMA 2008, the 17-70mm lens has a constant aperture of f4 through the entire zoom range, with a working focal length of 26-107mm. It has Pentax's SDM system with built-in supersonic motor for quiet and responsive autofocusing when used on a compatible Pentax DSLR. The lens is compatible with the