Sigma APO Macro 180mm F2.8 EX DG OS HSM lens is an image stabilized telephoto macro lens. The company claim it is the first 180mm macro to combine 1:1 reproduction with an F2.8 maximum aperture. It offers a closest focusing distance of 47cm (18.5 inches) and includes the company’s optical stabilization and ‘FLD’ fluorite-like glass elements. An internal focus design and ring-type HSM focus motor allow full-time manual focus override. This telephoto macro lens is compatible with most manufacturers, including Sigma, Canon, Sony, Nikon, Olympus, Panasonic and Pentax.
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This video below shows a look inside how Canon digital cameras are made. From clean rooms for sensor production to 3D modeling of camera design, it’s an interesting watch for those of us who have look at our cameras and wondered how these things came to be. 
