RE: Epson filmscan & grain

["Lee, Martin (Ex AS01)" <MLee@xxxxxxxxxxxxxxxx>]

perhaps the grain becomes visible when the resolution of the scanners
optics is very close to the "resolution" of the film. The interference
between the two, although not in a regular pattern may, result in some
visible grain in the scanned image!

an easy way to imagine this would be to hold two pieces of fly screen or
fine mesh against one another and you can see dark and light patches
where the strands in the mesh are in high or low density respectivly.

The reason one scanner may have more of a problem than another could be
the grain size of the optics in the scanner. If the optics' grain is
very small or very large compared to the film grain then the scanned
image would be free from graininess (or it would not be noticable). if
the optical grain was about the same size as the film grain then the
grain in the scanned image would be greater!

I am not an optical expert. These are just thoughts with no
expertise/experience to support them!

I hope they at least provoke some more useful thoughts....!

:-)

MARTiN
> -----Original Message-----
> From:	list@xxxxxxxxxxxxxx [SMTP:list@xxxxxxxxxxxxxx]
> Sent:	Wednesday, September 02, 1998 5:14 PM
> To:	panorama-l@xxxxxxxxxxxxxxxxx
> Subject:	Re: Epson filmscan & grain
> 
> Dear List
> 
> I thank members for their comments and suggestions on my problem as
> originally posted, a copy of which is included below. Although there
> are
> strategies for coping with the problem once the scan is complete e.g.
> selecting and then blurring the sky within photoshop, what still
> puzzles me
> is why the grain should show in a scan and not in a conventional
> photographic print when both are to the same size. I have also tried a
> different scanner to the Epson (The Leaf 45) and it does not show the
> grain
> as badly.
> 
> Any suggestions why the Epson should do this.
> 
> ---- Original Message follows ----
> 
> Has anyone got any experience of the Epson FS200 film Scanner. I have
> had
> one for some time but have not seriously used it until recently. My
> problem
> is one of it exaggerating, or at least markedly showing, the grain in
> the
> film. Yes I do mean grain not pixelalation. I have made a comparison
> with
> the results I get from this scanner and a conventional photographic
> based
> print from the same neg to the same magnification. The scanned version
> markedly shows granularity in plain areas such as skies.
> 
> Any suggestions!
> 
> Steve Dye
> Yorkshire, UK.
>