[rollei_list] Re: Scanning sheets of colour negatives
- From: "John Wild" <JWild@xxxxxxxxxxxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Tue, 17 Jun 2008 16:21:46 +0100
Hi Austin,
Thanks. My scanner does not have a transparency adapter and I am trying
to do it on the cheap with existing equipment. ;-). Is there a third
party adapter which can be used on any scanner?
Regards
John
-----Original Message-----
From: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Austin Franklin
Sent: 17 June 2008 14:01
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] Re: Scanning sheets of colour negatives
Hi John,
> One problem with colour negatives, scanned in colour using a flatbed
> scanner, is the resultant granularity. I guess it's to do with the
> pixel spacing on the scanner head (ie one pixel for each colour in a
group).
If you are referring to how a digital camera sensor array is done, using
a Bayer pattern where each sampled "location" is only one color, a
scanner is different. They use tri-linear sensors, therefore every
sampled "location"
gets all three colors.
I scan my sheeted negatives, both color and B&W, using an Epson 836XL
with a transparency adapter (light source on top of the scanner that
follows the sensor array). They come out great. 800PPI, not enough to
make any sizable prints out of, but great for "contact" sheets.
So, if you are not using a transparency adapter, I strongly suggest you
do.
Regards,
Austin
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