I remember watching the Andy Williams show on BBC1 (405 lines black & white) in the mid/late 1960's & the picture quality was dire = it looked blurred & any movement was jerky. Into the 70's the conversion quality improved but there was still the jerkiness & when in colour the colours were often wrong. The first live moon landing was converted twice = from 240 lines 10 frames per second to 525/60 FPS then to 405/50 FPS. The later landings looked very clear in comparison
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