Snooker The sport has become increasingly popular in China. The origin of snooker dates back to the latter half of the 19th century. In the 1870s, billiards was a popular activity amongst British Army officers stationed in India and several variations of the game were devised during this time. One such variation originated at the officers' mess of the 11th Devonshire Regiment in 1875, which combined the rules of two pocket billiards games, pyramid and life pool. The former was played with fifteen red balls and one black positioned in a triangle, while the latter involved the potting of designated coloured
Full-frame digital SLR the lens's image circle is captured. The edges are cropped off, which is equivalent to zooming in on the center section of the imaging area. The ratio of the size of the full-frame 35mm format to the size of the smaller format is known as the "crop factor" or "focal-length multiplier", and is typically in the range 1.3–2.0 for non-full-frame digital SLRs. When used with lenses designed for full frame film or digital cameras, full-frame DSLRs offer a number of advantages compared to their smaller-sensor counterparts. One advantage is that wide-angle lenses designed for full-frame 35mm retain that same wide