1. Lossless and lossy compression Lossless compression and lossy compression are two types of compression for digital image files.
Lossless compression is the compression of the file itself. Like the compression of other data files, it optimizes the data storage mode of the file and uses an algorithm to represent duplicate data information. The file can be completely restored without affecting the file content. In terms of images, there is no loss of image detail. The lossy compression is a change to the image itself. When the image is saved, more brightness information is retained, and the hue and color purity information is merged with the surrounding pixels. The combined ratio is different and the compression ratio is also different. The amount of information is reduced, so the compression ratio can be high and the image quality can be reduced accordingly.
2. GT lens gt lens refers to the unique design of Minolta multi-piece multi-group with clever lens components, lens lenses using high-end low-dispersion optical glass, which contains multiple molded aspherical lenses and so on. In other words, Minolta's g-series of high-end professional and traditional cameras (silver-salt camera) use the af lens, and Minolta will apply the process technology of producing g-series lenses to the design and production of digital cameras. It is called gt lens.
3. The Zeiss lens is zeiss. Zeiss is a German company that is dedicated to applied research and has contributed to the development, manufacture and sales of high-quality products such as optics, glass technology, precision technology, and electronics. Since 1846, Carl Zeiss has set up workshops for the production of microscopes. Zeiss lens, professional camera, camera lens 4. Wide-angle lens is wide angle, also called short-focus lens. Because the focal length of the wide-angle lens is very short, the scene projected onto the film becomes smaller and the angle of the lens is widened. In addition to shooting more scenes, it is possible to capture wide-angle images in a narrow environment.
Lossless compression is the compression of the file itself. Like the compression of other data files, it optimizes the data storage mode of the file and uses an algorithm to represent duplicate data information. The file can be completely restored without affecting the file content. In terms of images, there is no loss of image detail. The lossy compression is a change to the image itself. When the image is saved, more brightness information is retained, and the hue and color purity information is merged with the surrounding pixels. The combined ratio is different and the compression ratio is also different. The amount of information is reduced, so the compression ratio can be high and the image quality can be reduced accordingly.
2. GT lens gt lens refers to the unique design of Minolta multi-piece multi-group with clever lens components, lens lenses using high-end low-dispersion optical glass, which contains multiple molded aspherical lenses and so on. In other words, Minolta's g-series of high-end professional and traditional cameras (silver-salt camera) use the af lens, and Minolta will apply the process technology of producing g-series lenses to the design and production of digital cameras. It is called gt lens.
3. The Zeiss lens is zeiss. Zeiss is a German company that is dedicated to applied research and has contributed to the development, manufacture and sales of high-quality products such as optics, glass technology, precision technology, and electronics. Since 1846, Carl Zeiss has set up workshops for the production of microscopes. Zeiss lens, professional camera, camera lens 4. Wide-angle lens is wide angle, also called short-focus lens. Because the focal length of the wide-angle lens is very short, the scene projected onto the film becomes smaller and the angle of the lens is widened. In addition to shooting more scenes, it is possible to capture wide-angle images in a narrow environment.
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