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CMS-XML How to power the servo unit on a CINE-SERVO lens.
PDF Cine CN7x17_Product Manual. pdf
CMS-XML Operation by Focus Demand on COMPACT-SERVO lenses.
External Power Input is necessary when operation by focus demand is performed with the camera other than Canon digital cinema camera.
PDF CINEMA EOS LENSES
Optics, however, is not so kind. The famous “Cosine to the Fourth Power ” is a mathematical law – longago discovered – that defines a light transmissivity that falls from a maximum at the lens element center to a progressively lower level toward the image extremities. This is termed the Relative Light Distribution performance of the lens.
PDF 4k LENS
If this contrast characteristic of a given lens is plotted as a graph with spatial frequency as the horizontal axis we have the portrayal of the MTF of that specific lens. In the optical world, the unit of spatial frequency is typically in lines per mm – that is, the number of black and white line pairs passed through each millimeter dimension of a lens. The spatial frequency at which the MTF has dropped to a level below10%is referred to as the Limiting Resolution or the Resolving Power of the lens.