History of snooker pool and pyramid pool. Life pool involved several colored balls used as both cue balls and object balls. In pyramid pool, there were 15 red balls and a white cue ball, and each player received one point per red ball potted. Along with the new games being developed, the table was taking steps toward its current state. Black pool was the next version created. Black pool was similar to pyramid pool, except that the black ball from life pool was added to the game and could be potted for more points. In 1875, at the British Army Officer's Mess in
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