Your calculation on the film grains seems not right, if all grain has the
same size you need 256 (16x16) grains to represent 256 levels. But film
grains has variable size so you never know.
C.H.Ling
----- Original Message -----
From: "james king"
>
> I am having real problems with this argument about sensor spacing vs
> grain size.
> firstly since digital sensors see in black and white and require a
> coloured filter to see in colour you need 3 sensors to get colour not
> one. Secondly you need an antialias filter. thirdly there is space
> between each sensor which can therefore record nothing at all.
> *assuming* film grain is binary then you only need 8 grains to simulate
> 256 combinations and 24 grains to get 24 bit rgb. However film is
> layered (unlike digital sensors) therefore you only need 8 grains in
> three layers ontop of each other to get 24 bit rgb whereas digital
> requires three sensors.
> my 2pence worth
> James
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