Slide copier for Pentax

Toralf Lund toralf at toralf.net
Tue Jul 27 15:08:54 EDT 2010


Godfrey DiGiorgi wrote:
> On Mon, Jul 26, 2010 at 5:34 PM, paul stenquist <pnstenquist at comcast.net> wrote:
>   
>> I get a RAW file using vuescan on my Epson 3200. Or, I assume, with any other scanner.
>> Paul
>>     
>
> A VueScan raw file is different from a DSLR raw file. It's essentially
> a linear gamma RGB TIFF file without VueScan's image processing
> applied, and is designed specifically to allow multiple different
> adjustment settings to be tried with VueScan without having to run the
> media back through the scanner.
>   
You can also write in DNG format these days, though, and feed the file 
into "standard" raw converters. I would assume there isn't much you 
can't do with these files compared to the ones from a DSLR, apart from 
playing with the Bayer pattern interpolation parameters, obviously...

- Toralf
> DSLR raw files have quite a bit more flexibility in terms of what you
> can do with them. The negative side of DSLR capture is that you're
> dependent upon the quality of the optics, how well you focus them, and
> of course limited by whatever resolution the DSLR is capable of.
>
> However, with today's 10-14 Mpixel DSLRs and a suitable setup, you can
> achieve approximately the same image resolution as a 4000 ppi scanner
> with better dmax from 35mm film.
>   





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