[rollei_list] Re: Scanning sheets of colour negatives

Dear John
I wonder are you on the trail of a false economy here. I note that epson have 
the v500 scanner available refurbished for $149 on their web site. This one 
does medium format transparencies as well.  however if you are UK based this 
may not be a good option. 
All the best
Laurence Cuffe

On Tuesday, June 17, 2008, at 11:18AM, "John Wild" 
<JWild@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>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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