when you use a camera and you set it so the shutter stays open from anywhere 1/2 sec - 1/15 sec it allows more light to make contact with the film thus movement seems to blur as it is exposed through more points in time
figure something happening we'll say 1-2-3-4-5
1/60 shutter speed captures 3
while lets says 1/2 shutter captures 2-3-4 onto on picture
did I make that clear enough lol
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