Things seem a mite slow around here... So to pass the time I shall offer my services to anyone that wanders in. Just ask me a question about Photography - anything at all - and I shall do my best to answer it. This is a serious offer so no levity. It can be Technical, Scientific, Historical, Practical, Sociological, Philosophical, Psychological, whatever, just so long as it is a question that has been bugging you and you have been unable to find an answer... or one that you could understand. Any takers?