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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Magic Lantern (firmware) Magic Lantern is a firmware add-on for various Canon digital single-lens reflex (DSLR) cameras and the EOS M. [2] It adds features for DSLR filmmaking and still photography, and is free and open-source. Magic Lantern was originally written for the Canon EOS 5D Mark II [3] by Trammell Hudson in 2009 after he reverse ...
Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure.. Generally, it compensates for pan and tilt (angular movement, equivalent to yaw and pitch) of the imaging device, though electronic image stabilization can also compensate for rotation about the optical axis ().
Canon FD 35mm f/2. The Canon FD 35mm f/2.0 lens was manufactured by Canon for the FD lens mount. It was sold in a number of variations over the years, and was the fastest Canon lens in the 35mm focal length before the debut of the EF 35mm f1.4.
f-number. Diagram of decreasing apertures, that is, increasing f-numbers, in one-stop increments; each aperture has half the light-gathering area of the previous one. An f-number is a measure of the light-gathering ability of an optical system such as a camera lens. It is calculated by dividing the system's focal length by the diameter of the ...
Aperture (software) Aperture is a discontinued professional image organizer and editor developed by Apple between 2005 and 2015 for the Mac, as a professional alternative to iPhoto . Aperture is a non-destructive editor that can handle a number of tasks common in post-production work, such as importing and organizing image files, applying ...
Canon used its experience with small film cameras, particularly the APS IXUS, to mass-produce good digital cameras smaller than anyone else had managed up to the time (the first Digital IXUS was the smallest 2MP then available) and reused the popular IXUS/IXY/ELPH brand name with the tag line "The DIGITAL IXUS blends Canon's award-winning IXUS ...
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.