Dithering is an A/D technique used to improve resolution by introducing
a small amount of noise. It prevents getting stuck between code values
that result in a single output. Grain noise in film may keep everything
from getting stuck on monotone. Also, with digital cameras, in their
attempt to reduce noise by various algorithms, may be creating what you
describe in the sky of the E-1 shot. It is interesting the way our eyes
& brain perceive.
Wayne
At 11:58 AM 9/17/2004, Piers wrote:
>I can 'see' just what you mean, AG - the two images that CH posted last week
>(one E-1 and one OM) I think showed something similar. Looking at the blue
>sky, there was grain aplenty in the film image, but the digital image had
>recognisable 'steps' in the sky tone. OTOH the digital image did not appear
>to be of lower definition, and was very impressive ... but it didn't have
>the subtlety of the film image.
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