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Sigma 24mm f/1.8 EX DG lens; Sigma 24mm F1.4 DG HSM Art; Sigma 30mm f/1.4 EX DC HSM lens; Sigma 35 mm f/1.4 DG HSM lens; Sigma 50-500mm f/4-6.3 DG lens; Sigma 50mm f/1.4 DG HSM A lens; Sigma 50mm f/1.4 EX DG HSM lens; Sigma 60-600mm f/4.5-6.3 DG OS HSM lens; Sigma 70-200mm f/2.8 EX DG OS HSM lens; Sigma 70-300mm f/4–5.6 APO DG Macro lens ...
This is for companies who exclusively or predominantly create optical lenses for still and film photography. ... Sigma Corporation (2 C, 4 ... (eyeglass company) Essilor;
This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...
Reducing frame lens size will give the most noticeable improvement in weight for a given material. Ways to reduce the weight and thickness of corrective lenses, in approximate order of importance are these: Choose glasses frames with small lenses; that is to say so that the longest measurement across the lens at any angle is as short as possible.
Sigma 18–50mm f/2.8 EX DC Macro lens; Sigma 24mm f/1.8 EX DG lens; Sigma 30mm f/1.4 EX DC HSM lens; Sigma 50-500mm f/4-6.3 DG lens; Sigma 50mm f/1.4 EX DG HSM lens; Sigma 70-200mm f/2.8 EX DG OS HSM lens; Sigma 105mm f/2.8 EX DG lens; Sigma 150mm f/2.8 APO Macro EX DG HSM lens; Sigma 300–800mm f/5.6 EX DG HSM lens
It is the first such lens to provide the complete circular fisheye effect on crop factor digital SLR cameras, which do not have a full 36x24mm sensor. [1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts. This lens projects a 13mm image circle, which fits nicely in a Micro Four Thirds system frame with an adapter.
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