RE: filmscanners: exposing C41 for scanning ( was gibberish header)

["Hemingway, David J" <HEMINGD@POLAROID.COM>]

Rafe,
FYI, I also have a new 8000 ED that has the same banding issue but I am
having a hard time getting upset over it.:) When I do the fine ccd it does
get rid of the problem but when I read the "help" associated with the
button it says that "fine CCD" can add as much as three times to the scan
time. Having a hard time getting upset about that to. Oh well!!
David

> -----Original Message-----
> From: rafeb [mailto:rafeb@channel1.com]
> Sent: Friday, June 29, 2001 5:16 AM
> To: filmscanners@halftone.co.uk
> Subject: Re: filmscanners: exposing C41 for scanning ( was gibberish
> header)
> 
> 
> At 07:47 AM 6/29/01 +0100, you wrote:
> >On Thu, 28 Jun 2001 07:48:39 -0400 (EDT)  Raphael Bustin 
> >(rafeb@channel1.com) wrote:
> >
> >> but I wonder about the wisdom 
> >> of overexposing C41 film that will be 
> >> scanned.
> >> 
> >> In my experience, it's the dense images that 
> >> are more likely to stress the scanner into 
> >> banding.
> >
> ><IDLE SPECULATION> This sounds to me like the old (LS30 
> 'jaggies') Nikon 
> >stepper-motor foibles in a different guise, perhaps another 
> resonance 
> >issue which occurs when exposure is prolonged. Maybe Ed will 
> be able to 
> >alter timings in VS, as with the LS30... </IDLE SPECULATION>
> >
> >No banding problems here, ever, with a SS4000.
> 
> 
> Must admit I'm confused and concerned about the banding 
> on the LS-8000 these days.  I'd never noticed it before 
> Lawrence Smith's post, a few days back (along with that 
> awful JPG that was attached.)  But since then, I've seen 
> it a lot more often than I'd care to...
> 
> A couple of things have changed over here; for one, it's 
> been pretty hot.  For another, I'm scanning mostly 35 mm, 
> as opposed to the 645 negatives when I first received 
> the scanner.  Temperatures should be lower this weekend, 
> so maybe I can check out the "heat" angle.
> 
> The effect, when it appears, is usually pretty subtle. 
> One thing I notice is that the bands are quite wide and 
> quite periodic.  Aside from that, I'm still trying to 
> pin down just what causes it.
> 
> The "Super Fine Scan" checkbox worked quite dramatically 
> on one image, while I was on the phone with the Nikon 
> tech.  But the banding still appears occcasionally, on 
> other images, even with this option selected.
> 
> BTW, I think you're onto something with the theory 
> that the Nikon illumination LEDS are not all that 
> bright.  I've also noticed (and mentioned) that the 
> "noise" made by the scanner mechanism is unusually 
> and disturbingly coarse.  I can believe that the 
> audible "clicks" emitted by the scanner correspond 
> to the visible bands seen on the scans.
> 
> 
> rafe b.
> 
>