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 range and lower noise at high ISO levels. As a consequence, full-frame DSLRs may produce better quality images in certain high contrast or low light situations. Production costs for a full-frame sensor can exceed twenty times the costs for an APS-C sensor. Only 20 full-frame sensors will fit on an silicon wafer, and yield is comparatively low because the sensor's large area makes it very vulnerable to contaminants—20 evenly distributed defects could theoretically ruin an entire wafer. Additionally, when full-frame sensors were first produced, they required three separate exposures during the photolithography stage, tripling the number of masks and exposure