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Old 22nd Feb 2015, 08:32
  #20 (permalink)  
A A Gruntpuddock
Join Date: Jul 2007
Location: Fife, Scotland
Age: 75
Posts: 247
Way back when I used to develop & print all my b&w 35mm stuff I found that I could eventually count up to 2 minutes or more just as accurately as a digital timer.

Always wondered after that how humans could measure time so accurately, but there is no doubt that it is possible.
A A Gruntpuddock is offline