Art
Thanks for the reply.
The fringing I'm bothered about is definitely being created by the scanner -
I've got another scan of the same image that has little or no fringing. I
suspect the problem happens more often with thicker slide mounts but the
sample image you saw was from a colour neg (witness the white dust specks!).
The S20 doesn't seem to suffer from quite the same defects as the S10 but it
does also have some pretty unpleasant fine banding (alternate horizontal
stripes of different hues) visible in solid areas of colour. Blue skies can
be a problem. (Maybe that's the micro banding you mentioned?). Using the
despeckle filter in Photoshop fixes it, at the loss of a bit of resolution.
Again it's difficult to know how much to put up with in a "domestic"
scanner.
I'll give the upside down "fix" a try but it sounds like the scanner is
probably going back to the dealer. I've only had it a few weeks and I have
already phoned them and told them I thought there was a problem with it.
Best regards
Mike Brown
> -----Original Message-----
> From: filmscanners_Digest_owner@halftone.co.uk
> [mailto:filmscanners_Digest_owner@halftone.co.uk]
> Sent: 08 July 2002 08:26
> To: mike.brown@mindblown.com
> Subject: [filmscanners_Digest] filmscanners Digest for Mon 8 Jul, 2002
>
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Topic: [filmscanners] Colour fringing
> ================================
> Date: Sun, 07 Jul 2002 04:02:17 -0700
> From: Arthur Entlich <artistic-1@shaw.ca>
> ----------------------------------------
> Hi Mike:
>
> Before I make any comment, below is the exact note I supplied to my
> computer retailer when I returned my HP S-20 for a refund (they had to
> ship it back to HP, so they asked me for a defect list...)
>
>
> > HP S-20 Scanner SN.SG8BBXXXXX
> >
> > Problems:
> >
> > 1) Color fringing (red/green) in bars going across image width
> >
> > Attempted suggested correction by HP of turn scanner over and
>
> cycling through modes several times. Did not improve matter.
> >
> > 2) excessive response to reds in transparencies, causing burned
>
> flesh tones, which are difficult to correct.
> >
> > 3) Double cycles eject when ejecting slides and negative strips.
>
> Sometimes doesn't acknowledge slide or neg when introduced into carrier.
>
> ===============
>
> Make sure your images are not manifesting color fringing from optical
> problems with your camera lenses (although you seem to imply this isn't
> the case). Look over your images with a quality loupe. Then try what
> HP suggested, turn the scanner over, and cycle it through the three
> different modes (slide, neg, print) several times, and the try it again.
>
> My S-20 had two types of fringing. The type I can see in your image,
> and a micro fringing that you had to zoom in tight to seem. It was a
> type of banding fringing that was directly related to the resolution I
> scanned at. It was also red/green, and it was particularly obvious if I
> scanned a black and white slide or a black and white negative as a
> slide, since it was the only color in the image.
>
> History:
>
> My first film scanner was a HP S-10. I went through 3 of them trying to
> get one that didn't band in the shadows, and all of them suffered from
> one defect of another.
>
> Finally, HP offered me the "new" S-20, although the banding was gone, it
> had a number of other problems, and eventually it too went back to HP,
> and I ended up with A Minolta Dual II, a much better scanner, but still
> not without defects and problems.
>
> The problem is that the optics are just not good enough in that scanner.
> It has a very complex optical path due to the "feature" of allowing it
> to scan both transmissive and reflective things (reflective at 300 dpi,
> which my today's standards is a bit of a joke). There are so many
> moving objects in the scanner light/optical path (mirrors, etc) that I'm
> amazed it works at all.
>
> At the time the S-10 came out, that model was the least expensive film
> scanner on the market. Today, there are numerous better models for
> about the same price (The Canon FS-2710, the Minolta Dual II, and
> cheaper ones (although slightly lower resolution) like the
> Primefilm 1800U.
>
> If the unit is still under warranty, get in touch with HP about it. If
> they can't replace it with one that doesn't fringe, get your money back
> and buy something else. Slide scanners should not show color fringing,
> any more than should a quality lens.
>
>
> Art
>
>
> Mike Brown wrote:
>
> > I'm relatively new to the list so apologies if this one has been done to
> > death but...
> >
> > I recently bought a cheap-ish scanner, an HP Photosmart S20,
> and I've been a
> > bit disappointed with the results. I'm getting better results
> overall now
> > I've bought Vuescan but haven't resolved the fringing issue.
> It's difficult
> > to know what to expect as nobody ever puts full size sample
> files on their
> > websites! I've done the usual trawl around the net but can't
> find fringing
> > mentioned as a particular problem.
> >
> > I started off scanning some very old slides & noticed the fringing.
> > Initially I put it down to having used a cheap teleconverter
> with a russian
> > lens. I've noticed the problem with other slides and negatives
> though and I
> > think it's something to do with the stepper motor drive or film
> slippage.
> > The fringing is always across the narrow dimension ie at 90
> degrees to the
> > direction of movement. The fringing isn't always there and is often only
> > present in a few places in the scan (or is much worse in a few places).
> > Rescanning produces different results, sometimes with no fringing.
> >
> > If anyone wants to take a look there's a small jpg extracted
> from a larger
> > scan at . A
> > quarter-resolution version of full 2400dpi scan is available at
> > . Personally
> I'm aware of
> > red fringes on the right hand side of the verticals even at 800x600.
> >
> > Comments gratefully received!
> >
> > Mike Brown
> >
> >
> >
> >
> >
> >
> >
> >
> >
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