Digital BW, The Print

No banding on the negs, also I have made gelatin silver prints in a wet darkroom that look fine.
David Aschkenas

> No banding on the negs, also I have made gelatin silver 
> prints in a wet darkroom that look fine. David Aschkenas

I get banding in the light sky areas of my 6x7 transparencies scanned
with the Epson 3200. I had the same problem, but even worse, with my
previous CanoScan 9900f, and returned it for that reason.

Does it by any chance look something like this?
http://download.petraflux.com/img/streaks2.jpg

--
Daniel Staver
http://daniel.staver.no

Daniel, it looks a bit like that, but no actual lines, just slight undulations  (banding ) in certain sky areas.  Not thru the entire image.
David Aschkenas

> Daniel, it looks a bit like that, but no actual lines, just 
> slight undulations  (banding ) in certain sky areas.  Not 
> thru the entire image. David Aschkenas

I'm just wondering if it's a limitation of flatbed scanners in general
since I had the same problem with both the 9900 and the 3200...

--
Daniel Staver
http://daniel.staver.no

Daniel,

I've recently started scanning Polaroid type 55 negs using an Epson  
3200 with Vuescan and have not seen the banding you described.

Carl Schofield

On Sunday, November 30, 2003, at 11:53  AM, Daniel Staver wrote:

>> Daniel, it looks a bit like that, but no actual lines, just
>> slight undulations  (banding ) in certain sky areas.  Not
>> thru the entire image. David Aschkenas
>
> I'm just wondering if it's a limitation of flatbed scanners in general
> since I had the same problem with both the 9900 and the 3200...
>
> --
> Daniel Staver
> http://daniel.staver.no
>
>
>
>
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> I've recently started scanning Polaroid type 55 negs using an Epson  
> 3200 with Vuescan and have not seen the banding you described.

The example was from the 9900 that I returned, with the 3200 it's less
pronounced. Here's one I just made from the 3200:

Converted to grayscale and increased contrast:
http://daniel.staver.no/img/3200.jpg

Original:
http://daniel.staver.no/img/3200_2.jpg

You'll see that the BW version has vertical banding in the sky, while
it's not easily visible in the original. 

Rotating the transparency 90 degrees on a scanner makes the problem even
less visible.

--
Daniel Staver
http://daniel.staver.no

Daniel,

I'm scanning in 16 bit greyscale, so don't know if that makes a  
difference or not.  Here is an example from a type 55 negative, scanned  
at 1200 dpi (select the large image size for better detail):
http://www.schophoto.com/gallery/photo.php?photo=553&lang=eng
The large image was reduced in size from the original scan, which was  
5400x4179 pixels.

Carl Schofield

On Sunday, November 30, 2003, at 01:25  PM, Daniel Staver wrote:

>> I've recently started scanning Polaroid type 55 negs using an Epson
>> 3200 with Vuescan and have not seen the banding you described.
>
> The example was from the 9900 that I returned, with the 3200 it's less
> pronounced. Here's one I just made from the 3200:
>
> Converted to grayscale and increased contrast:
> http://daniel.staver.no/img/3200.jpg
>
> Original:
> http://daniel.staver.no/img/3200_2.jpg
>
> You'll see that the BW version has vertical banding in the sky, while
> it's not easily visible in the original.
>
> Rotating the transparency 90 degrees on a scanner makes the problem  
> even
> less visible.
>
> --
> Daniel Staver
> http://daniel.staver.no
>
>
>
>
> ------------------------ Yahoo! Groups Sponsor  
> ---------------------~-->
> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
> Printer at MyInks.com. Free s/h on orders $50 or more to the US &  
> Canada.
> http://www.c1tracking.com/l.asp?cid=5511
> http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/ucIolB/TM
> --------------------------------------------------------------------- 
> ~->
>
> Please visit the Group Homepage to check the Files, Bookmarks, Polls  
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They are not newton's rings, I know what they look like, and this is definitely banding.  Also, keep in mind that this is a 20K scanner, not a consumer item.
David Aschkenas

I will try the 90 degree rotation, but since its a friends scanner, I'm not sure when I'll be able to test it.
David Aschkenas

At 05:53 PM 11/30/03 +0100, you wrote:
> > Daniel, it looks a bit like that, but no actual lines, just
> > slight undulations  (banding ) in certain sky areas.  Not
> > thru the entire image. David Aschkenas
>
>I'm just wondering if it's a limitation of flatbed scanners in general
>since I had the same problem with both the 9900 and the 3200...
>
>--
>Daniel Staver
>http://daniel.staver.no

Daniel,

I've never seen banding using my 3200 on color and b/w pan negs.  Are they 
are consistent or random bands?  Do you hear uneven noise while scanning? 
Try scanning plain white paper and then checking it in PS Threshold.

AZ




>
>Please visit the Group Homepage to check the Files, Bookmarks, Polls and 
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>them short.
>- As the topic of a thread changes remember to change the subject header.
>- Good manners are required at all time. No personal attacks or flames
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>- Before posting a question, search the message archives and the various 
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>
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At 07:25 PM 11/30/03 +0100, you wrote:
> > I've recently started scanning Polaroid type 55 negs using an Epson
> > 3200 with Vuescan and have not seen the banding you described.
>
>The example was from the 9900 that I returned, with the 3200 it's less
>pronounced. Here's one I just made from the 3200:
>
>Converted to grayscale and increased contrast:
>http://daniel.staver.no/img/3200.jpg
>
>Original:
>http://daniel.staver.no/img/3200_2.jpg
>
>You'll see that the BW version has vertical banding in the sky, while
>it's not easily visible in the original.
>
>Rotating the transparency 90 degrees on a scanner makes the problem even
>less visible.
>
>--
>Daniel Staver
>http://daniel.staver.no

I don't see the bands - can you describe them? location, frequency, etc?

AZ
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The Lookaround Book, 2nd ed.
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