Archived posting to the Leica Users Group, 2001/11/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > What problems does the LS-8000 have ? On paper, it seems such a dream > > multi-format scanner. One issue is it uses LEDs for a light source, and that is a point light source. Because of this scratches and dust show up more so than with normal diffuse lighting...which is why Digital Ice is more or less necessary for the Nikon, and not so for other scanners without point source lighting. Second issue is banding. The Nikon uses a tri-linear sensor (three parallel sensors) and therefore scans three lines at one time...since the LEDs change color, there are no color filters over the CCD. Well, they made a mistake in their firmware/hardware design, and they only calibrate one of the three CCD rows, and apply that single calibration to all three rows. Needless to say, it results in banding. This can be worked around by scanning with one CCD row. I have also heard of DOF problems with this scanner...it apparently has a very shallow DOF, and requires the negative to be very coplanar to the CCD, as well as very flat. I'm sure it's a fine scanner, but it does apparently have some problems. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html