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The J-3 camera on board the KH-4B spy satellite was planned to use a 24in f3.5 Petzval lens. [4] In 2013, Lomography successfully launched a crowdfunding campaign at kickstarter.com to produce a new Petzval lens in Russia for film and digital cameras. [5] Lensbaby offers Petzval lenses for modern cameras under the Burnside and Twist names. [6]
Field curvature: the image "plane" (the arc) deviates from a flat surface (the vertical line). Petzval field curvature, named for Joseph Petzval, [1] describes the optical aberration in which a flat object normal to the optical axis (or a non-flat object past the hyperfocal distance) cannot be brought properly into focus on a flat image plane.
The term camera is also used, for devices producing images or image sequences from measurements of the physical world, or when the image formation cannot be described as photographic: Acoustic camera which makes sound visible in three dimensions
This list compares main features of digital single-lens reflex cameras (DSLRs). Order of this list should be firstly by manufacturer alphabetically, secondly from high end to low end models. Brand
An optical axis is an imaginary line that passes through the geometrical center of an optical system such as a camera lens, microscope or telescopic sight. [1] Lens elements often have rotational symmetry about the axis. The optical axis defines the path along which light propagates through the system, up to first approximation.
Canon offered seven specialty lenses for the FD mount. The 35mm f / 2.8 Tilt-Shift lens is a perspective control lens which includes controls to shift the lens off-axis by ±11mm for perspective control. In addition to shift, it may be tilted ±8 degrees for depth of field control; both movements are possible simultaneously.
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 (). [1]
for A-mount lenses on full-frame E-mount camera, SLT-PD-AF with all AF lenses. [41] Sony Lens Adapter E/A 5 2020 Mount adapter 35mm 88g LA-EA5 only compatible with certain camera/lens combinations, [42] uses camera's on-sensor PD/CD AF (no mirror). [43] Sony Lens Adapter E/B 1 2019 Mount adapter S16mm 430g [44] LA-EB1