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The Sony α7R IV (model ILCE-7RM4) [2] is a full-frame mirrorless interchangeable-lens camera manufactured by Sony. It was announced on 16 July 2019 as the successor to the Sony α7R III launched two years prior.
DxOMark gave a score of 39 points for the Sony FE 24-70mm F2.8 GM II and 32 points for its predecessor, both tested on a Sony A7R IV. The measured sharpness increased from 33 Mpix to 40 Mpix, the measured chromatic aberration decreased from 10 μm to 5 μm, and the distortion (distortion of straight lines in the real world for example ...
The Sony α7 and α7R have the model numbers ILCE-7 and ILCE-7R respectively. In addition, the α7S, the α7 II, and the α7R II have the model numbers ILCE-7S, ILCE-7M2, and ILCE-7RM2. Sony's new model naming prefix strives to unify model names. "ILC" stands for Interchangeable Lens Camera, followed by an indicator of A-mount "A" or E-mount "E ...
Camera and display technology is evolving with more distinct primaries, spaced farther apart per the CIE chromaticity diagram. Displays with more separated primaries permit a larger gamut of displayable colors, however, color data needs to be available to make use of the larger gamut color space. xvYCC is an extended gamut color space that is backwards compatible with the existing BT.709 YCbCr ...
The Sony α7 IV (model ILCE-7M4) is a full-frame mirrorless interchangeable-lens camera manufactured by Sony. It was announced [ 1 ] on 21 October 2021 as the successor to the Sony α7 III . Featuring a new 34.1MP (approx. total) [ 2 ] back-illuminated CMOS sensor inside, latest BIONZ XR™ image processor, Real-Time Eye AF tracking and 4K 60p ...
BIONZ is a line of image processors used in Sony digital cameras.. It is currently used in many Sony α DSLR and mirrorless cameras.Image processing in the camera converts the raw data from a CCD or CMOS image sensor into the format that is stored on the memory card.
Memorial in Jena, Germany to Ernst Karl Abbe, who approximated the diffraction limit of a microscope as = , where d is the resolvable feature size, λ is the wavelength of light, n is the index of refraction of the medium being imaged in, and θ (depicted as α in the inscription) is the half-angle subtended by the optical objective lens (representing the numerical aperture).
Because diffraction is the result of addition of all waves (of given wavelength) along all unobstructed paths, the usual procedure is to consider the contribution of an infinitesimally small neighborhood around a certain path (this contribution is usually called a wavelet) and then integrate over all paths (= add all wavelets) from the source to the detector (or given point on a screen).
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