Thickness
shape
size
color/contrast
elevation of privies
Motion picture camera uses the picture stabilizer property to minimize blur pic on moving which is not present in still cameras !
If you mean counting triplets as in how to write them then you write them as you would any normal triplet. A quaver triplet would be a crotchet and a crotchet triplet would be a minim (although crotchet triplets aren't used much)