Obiettivo Samyang 8mm T3.8 Asph IF MC Fisheye CS VDSLR x Nikon

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Samyang 8mm T3.8 Asph IF MC Fisheye CS VDSLROptical construction of the Samyang 8mmT3.8 Fish-eye CS VDSLR (Video DSLR) lens is based on 8mm 1:3.5 Fish-eyeCS model, and is specially developed for filming and video purposes withcropped sensor DSLRs and professional camcorders with correspondingmounts.The Samyang 8mm fisheye lens T3.8 features an apertureof f3.5 (quoted as T3.8, which is the f/number of a lens corrected forthe light loss during transmission through the lens. T-numbers areimportant in film industry, where TTL metering is not common, and alsohelps to distinguish between this video version of the lens, and thestandard Samyang 8mm F3.5 fish-eye. Optically they are identical, featuring 10 elements in 7 optical groups, one aspherical lens element, and multicoated optics.Characteristicfeatures of the new model include toothed rings compatible withprofessional geared follow-focus systems available in the film industryand likewise a toothed smoothly adjustable aperture ring. Suchmodifications allow for extremely precise control over focus andaperture during video recording / filming. This allows for ultimatemanual control of exposure when filming from one scene to another withdifferent light source intensities, such as changing exposure values(EVs) from inside to outside, or even in-camera fade ins etc.Itcan be also perfectly used in stills photography, however users mayfind the standard stepped / clicked aperture version (Samyang 8mm F3.5fish-eye) possibly more suitable choice to avoid accidental changing ofthe aperture between shots.The Samyang 8mm T3.8 fish-eye lensis a manual focus lens, and offers a very large depth of field / depthof focus. The 8mm T3.8 fisheye features a built in lens hood to helpreduce lens flare from light sources from behind the lens.Initially available in Canon and Nikon mounts, other mounts are in the pipeline! Watch this space!It is a full frame diagonal fisheye lens for APS-C DSLRs, meaningthat the image it produces fills the frame on APS-C cameras. It producesan immense field of view - 180 degrees on 1.5x crop sensors, such asthe Nikon D7000, or on 1.6x crop sensors such as Canon EOS APS-C DSLRsproduces 167 degrees.Fisheye lenses are popular for specialeffects use where distortion and field curvature, exaggeratedperspective, or extreme depth of field are desired. Groups such asskateboarders are embracing the Samyang fisheyes for skate videos andphotography, due to their very high quality, yet are an extremelyaffordable option, the alternatives are highly expensive, or are lowquality lens adapters offering sub-standard quality.The Samyang8mm fisheye lens offers some of the best optics in a lens for itsclass, with exceptional value for money. A specialist lens, affordableto every videographer or photographer.SpecificationManufacturerSamyang OpticsModelSamyang 8mm T3.8 Aspherical IF MC Fisheye VDSLRLens typefull frame diagonal fisheye (for APS-C Sensors)Focal length8mmMaximum apertureT3.8Min apertureT22Angle of view180 degrees on 1.5x crop APS-C sensorsMin focusing distance0.3mNo. of diaphragm blades6Focus typeMF (Manual Focus only)Lens construction10 elements / 7 Groups / 1 Aspherical lensDimensions75 x 74.8 mmWeight435gAvailable mountsNikon