Robert William Sandford: Our Vanishing Glaciers Film Size_120 The sophisticated optical design and

The sophisticated optical design and construction of the lens comprises eight elements - including one with two aspherical surfaces and another four with anomalous partial dispersion - and plays a decisive role in reducing distortion and vignetting to an absolute minimum

What emerged was a photo diary--sunlit kodachromes show happy youths strumming guitars at Christian camp

8 maximum aperture delivers excellent low-light performance and control over depth of field for beautiful defocussed backgrounds

Radial Guider or Tele-Extender

including 1 aspherical lens element and 1 ED lens element

Robert William Sandford: Our Vanishing Glaciers Film Size_120 The sophisticated optical design andWritten by one of the most respected experts in water and water associated climate science and featuring stunning photography collected over the past four decades, Our Vanishing Glaciers explains and illustrates why water is such a unique substance and how it makes life on this planet possible. Focusing on the Columbia Icefield, the largest and most accessible mass of ice straddling the Continental Divide in western North America, and featuring