The Sony 500mm f/4 G SSM (SAL500F40G) is a professional grade super-telephoto lens for A-mount SLR and SLT cameras. Billed as the longest fixed-focal-length G lens from Sony to date, the Sony G 500mm f/4 SSM includes 11 elements in 10 groups, including three ED (Extra-low Dispersion) glass elements. It’s also the first G lens from Sony to benefit from an advanced new coating process that ensures crisper, clearer images. Exclusive to Sony, the Nano AR Coating process is claimed to cut internal reflections “drastically”. The lens’ SSM (SuperSonic-wave Motor) features a new drive circuit that ensures rapid, responsive AF with significantly faster object tracking than conventional Sony lenses. Four focus hold buttons are spaced around the lens barrel for easy operation in any position. They’re complemented by a two-way DMF (Direct Manual Focus) mode button and focus range switch. Focusing ring and front/rear joints are protected by interlocking seals that ensure a high degree of protection from the elements. Built to order, the SAL500F40G super-telephoto lens from Sony is available in the UK from April 2012.
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