I created this simple chart......
(PS: would it be too mischievous or only more instructive to re-post here, under a "What Went Wrong?"-style heading?)
Thanks edu T for the suggestion. I might just do that if this slides off the page without further interest.
I suppose I should have added the following: -
Card shot f3.4 1/125thsec
Black 1/4th sec; these last three at f5.6 and it would probably have been better if I had used f5.6 for the card shot as well and keep one constant in the equation.
Quote hhgttg: Life is wasted on the living.
filibuster (Bromsgrove, Worcestershire, UK)