Xref: utzoo comp.graphics:18903 rec.photo:23001 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!olivea!uunet!math.fu-berlin.de!ira.uka.de!unido!gmdzi!strobl From: strobl@gmdzi.gmd.de (Wolfgang Strobl) Newsgroups: comp.graphics,rec.photo Subject: Re: Scanning negatives (Re: Can handheld scanners scan BACKLIT images?) Message-ID: <5031@gmdzi.gmd.de> Date: 28 Jun 91 15:27:03 GMT References: <2835@umriscc.isc.umr.edu> <4993@gmdzi.gmd.de> Followup-To: comp.graphics Organization: GMD, St. Augustin, F.R. Germany Lines: 46 wdr@wang.com (William Ricker) writes: [...] > I don't know if there is any easy way to disable the inboard >lamp(s) without voiding warranty. There is no switch, and the documenation doesn't describe the interface. Logitech offers some kind of programmers toolkit for the scanner, but I don't know how much it costs. Perhaps it allows switching the light independent of the scanning function. > Did you try full range of contrast settings of the scanman? Yes, but in vain. The contrast knob has a range from 1-10, but there is not much difference between 1 and 3, for most of my negatives. The picture gets lighter when scanned using position 1, but lack any details in the shadows - it simply becomes gray in gray. I get bad results with negatives where the base material which carries the the sensitive layer has a color (i.e. gray, not white) itself. > I assume you used the Ansel software that comes with the scanner to >do negative reversal for previewing. Did you try adjusting >the contrast while viewing? Alt-View, Show B/C gives you a pair of sliders >to control brightness and contrast. This will let you explore the image's >highlights and dark recesses separately. You can also selectively lighten >and darken regions, if you want to emulate burning in and holding back >digitally. Yes, this works very well - I bought the Scanman mostly because of the included Windows based Ansel software. >>Scanning color negatives didn't work at all. > I wouldn't expect it to; the built in light source is monochrome. Hm. Scanning color positives works better that I expected. The light source is pure red, so everything looks like seen through a red filter, which gives an view which is quite unnatural. But the effect on paper pictures seems to be weaker than if you do the filtering when you take the picture. My main problem when scanning color paper positives is that a picture which seems to be perfectly sharp on paper may look blurred after scanning. Wolfgang Strobl