Dan uses "Diffusion Dithering". I have been experimenting a bit with
Dan's methods, and have come up against an obstacle which I may not be
able to overcome. In large areas of very light, fairly uniform tone,
such as the sky for instance, the prints from my bitmapped negs looks
"gritty". This is due to the light tone being made up of mostly white
areas with a sprinkling of black "dust" -- bitmapped dots really.
I am now thinking that I may have to output a continuous tone negative on
a film recorder (4x5 or 8x10 film) and then optically enlarge that
negative up to the size I want. Speaking of which, anyone know someone
(service burea, photo lab, person) who can make a 16x20 enlarged neg from a
4x5 neg for me (I don't have a proper B&W darkroom). :(
Thanks!
David