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Digital Negative (DNG) is an open, lossless raw image format developed by Adobe and used for digital photography. It was launched on September 27, 2004. [ 1 ] The launch was accompanied by the first version of the DNG specification, [ 2 ] plus various products, including a free-of-charge DNG converter utility.
There have been a great number of anamorphic format trade names, for reasons of prestige, technology, or vanity. The basic 35 mm anamorphic format originally popularized as CinemaScope has been known by a number of other monikers. In some cases, these names actually refer to different lens designs and technologies implemented; however, the ...
A format designed by the Joint Photographic Experts Group, that allows files of coloured images to be compressed to a smaller digital file than if the full range of colours were to be saved. Also .JPG as a computer file extension. [8] LBA: Lens buying addiction. Usually used in a jocular sense on camera forums, about a wish to add to an already ...
The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras, a lens of a given focal length gives a narrower field of view in such cameras.
The position of the stop, the optical characteristics of the glasses used for each element, the curvature of each lens surface, and the negative format that the lens is designed to cover, are all vital to the performance of the lens, and in the Leica lens these were all different from the Tessar.
In some zoom lenses it is placed some distance away from the ideal location in order to accommodate the movement of floating lens elements needed to perform the zoom function. Most modern lenses for 35mm format rarely provide a stop smaller than f/22 because of the diffraction effects caused by light passing through a very small aperture.
Cooke triplet. According to Taylor, the lens design was derived by considering a cemented achromatic doublet consisting of one thin negative element and one thin positive element, both of equal power; such a doublet would result in a compound lens with zero net power but also a flat field of focus.
Silent film has no standard speed; many amateur formats have several common speeds, but no standard. Negative lenses indicates whether spherical (normal) or anamorphic lenses are used on the original camera negative, and if anamorphic lenses, what anamorphic power is used. Projection gauge is the film gauge (width) used for the release print.
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