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Enlarger lens: using the aperture ring, the photographer adjusts the iris diaphragm. The image from the negative or transparency is projected through a lens, typically fitted with an adjustable aperture marked with f/ stops, onto a flat surface bearing the sensitized photographic paper. By adjusting the ratio of distance from film to lens to ...
Electronic Timer-Analyzer. A photo-lab timer, photo interval timer, or darkroom timer is a timer used in photography for timing the process of projecting negatives to photosensitive paper with an enlarger, making photographic prints of them at any scale.
The resulting image is larger than the original, and preserves all the original detail, but has (possibly undesirable) jaggedness. The diagonal lines of the "W", for example, now show the "stairway" shape characteristic of nearest-neighbor interpolation. Other scaling methods below are better at preserving smooth contours in the image.
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An image scaled with nearest-neighbor scaling (left) and 2×SaI scaling (right) In computer graphics and digital imaging, image scaling refers to the resizing of a digital image. In video technology, the magnification of digital material is known as upscaling or resolution enhancement.
The Arnold D enlarger model features a faster standard lens than any of the others. [3] The Zenith 35, initially designed as part of a field portable darkroom kit for the military, was the sole model to have survived the Sun Ray Photo Company itself, and continued in production by the TestRite Instruments Company of NJ under their Fotolarger ...