Pentax has announced what is a rare bird indeed soaring in the the skies of digital: a truly compact, true ultra-wide-angle prime (single-focal-length) made-for-digital lens. The new SMC-Pentax DA 15mm ƒ/4 ED AL Limited (note that Pentax Limiteds are not limited production products) features metal (aluminum) construction, has an angle of view of 86 degrees (about the same as a 23mm lens on 35mm), is less than two inches (39.5mm) long, and weighs a mere 7.5 ounces (212g). It features super-hard SP coating, Quick-Shift manual focus on demand, and ED glass and a hybrid aspherical element.
Pentax continues to lead the way with primes. Live long and prosper, Pentax! With so little in the way of a weight and space penalty, this useful beast will find a place in lots of camera bags, I'm guessing.
Featured Comment by Jerred Zegelis: "I teach high school photography, and one of the reasons I purchased a whole classroom set of Pentax cameras was because of their fantastic lens selection—both new and old. There are many other reasons, of course, but the staggeringly high variety of stuff that's out there for Pentax is just way too cool!"