Pentax has (re-)introduced the SMC-Pentax DA645 25mm ƒ/4 AL [IF] SDM AW for the medium-format 645D, a 19mm-equivalent superwide lens. The protrusion on the side, as you probably realize, is a half-opened filter drawer, showing a 40.5mm filter. Note the knurled wheel, which I assume allows you to rotate polarizers.
The new 25mm makes 15 lenses available for the 645D, although only two of them are made specifically for the camera. The new 25mm will be the widest.
The 25mm ƒ/4 incorporates many of Pentax's premium optical technologies, including two aspherical elements, superlative "Aero-Bright" antireflection coatings, weatherproofing, Supersonic-Direct-drive Motor (SDM) autofocus, a rounded diaphragm, a built-in lens hood, quick-shift (AF to manual) focus, and "Super Protect" (SP) coating on the outer element to repel dirt, dust, and grease.
The new lens will cost a nickel short of five grand in the U.S. and is expected to be available in mid-May.
Note: Links in this post may be to our affiliates; sales through affiliate links may benefit this site. More...
Original contents copyright 2012 by Michael C. Johnston and/or the bylined author. All Rights Reserved.