All About Photographic Lenses.
Specifications, comparison, reviews, MTF-charts for lenses by Canon, Nikon, Sony, Pentax, Olympus, Sigma, Tamron, Carl Zeiss, etc.
Photos taken with a lens: Carl Zeiss Vario-Sonnar T* DT 16-80 mm  f/ 3.5-4.5 ZA (3)