Archived posting to the Leica Users Group, 2001/11/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Austin, Thanks. Makes sense to me. I understand the Leafscans are pretty nice. I know of a 35 that's gathering dust. Be great for my b/w 35mm negs but the owner won't part with it....yet. Dave. At 01:11 PM 11/7/2001 -0500, you wrote: > > Austin, > > > > Interesting. Are you referring to the Leafscan 35? > >That and the Leafscan 45...I use both. The 45 is 5080, and the 35 is 4000. > > > Seems to me color gets all the attention in digital. But what about b/w? > >For the most part, that's ALL I do. > > > This may be faulty logic on my part, but I'll throw it out. The current > > commerically viable pirosumer CCDs are capable of scanning 4000 > > dpi color. > > I assume this requires 4 sensors in a quad and not linear configuration > > (could be wrong but it seems that's the case when I looked at some CCD > > schematics a while back) > >Film scanners to not require 4 sensors in a quad...they use three FULL width >sensors (or scan three with three passes, one for each color with a >different filter). The issue you refer to is not an issue with film >scanners. > > > Does that mean someone could manufacture a greyscale scanner that > > scans at > > twice the resolution, or 8000 dpi? > >Separate issue... > > > Or better yet, might someone > > write some > > different firmware or software that would allow current scanners to do > > that. Look what Jon Cone did for inkjet printing of greyscale images with > > Piezography with a custom driver. > >Really entirely different beast. Cone really didn't increase the resolution >of the printer, but uses all four ink positions so he can get much tighter >spacing on the tones (since you can now use 4x as many inks in your dither >pattern), therefore it appears dotless. > >Scanners are typically limited on one axis by the stepper motor >resolution...and they can only step in such a small increment...and on the >other axis by the width of the sensor combined with the magnification. > >Regards, > >Austin > >-- >To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html