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[filmscanners] RE: Polaroid Dust and Scratch Removal


  • To: lexa@www.lexa.ru
  • Subject: [filmscanners] RE: Polaroid Dust and Scratch Removal
  • From: "Kapetanakis, Constantine" <KAPETAC@polaroid.com>
  • Date: Wed, 22 May 2002 14:54:35 -0400
  • Unsubscribe: mailto:listserver@halftone.co.uk

The light itself has nothing to do with sharpness. Sharpness is a fuction of
how good your focus is.
Think of it like this.
You have flash light and a flourescent tube.  Place an object in front of
the flashlight. You will see a very distinct shadow cast on the wall. If you
place the same object in front of the flourescent tube you will probably not
get a shadow and if you do it will not be as well defined. The CCD sensor of
the scanner is picking up the shadow of imperfections/dust on the film
surface. The harsher the light source the more distinct the shadow.


-----Original Message-----
From: Bob Frost [mailto:bob@frost.name]
Sent: Wednesday, May 22, 2002 2:09 PM
To: KAPETAC@polaroid.com
Subject: [filmscanners] Re: Polaroid Dust and Scratch Removal


Constantine,

Don't the same considerations apply to the illumination of detail in the
image? Doesn't the Polaroid cold cathode light provide a softer image of the
details you want as well as of the details you don't want? If not, would you
explain why not? If one type of illumination is harsh, and one is soft, I
would have thought that applied to everything in the light path, not just
dust. But I don't mind learning why this is not so.

Bob Frost.

----- Original Message -----
From: "Kapetanakis, Constantine" <KAPETAC@polaroid.com>
To: <bob@frost.name>
Sent: Wednesday, May 22, 2002 6:15 PM
Subject: [filmscanners] RE: Polaroid Dust and Scratch Removal


Absolutely right. The Nikon scanner is using a narrow and focused beam of
light that will generate shadows even of the slightest film surface
imperfections.
The Polaroid scanner cold cathode light source, provides a softer more
diffused light.


-----Original Message-----
From: Simon Lamb [mailto:simon@sclamb.com]
Sent: Wednesday, May 22, 2002 1:04 PM
To: KAPETAC@polaroid.com
Subject: [filmscanners] Re: Polaroid Dust and Scratch Removal


I think Art meant that the LED light source in the Nikon scanners is more
susceptible to picking up the presence of dust than other scanners.
Specifically, the cold cathode light source in the SS120 hardly picks up
dust.

Simon

----- Original Message -----
From: "Maris V. Lidaka Sr." <mlidaka@ameritech.net>
To: <simon@sclamb.com>
Sent: Wednesday, May 22, 2002 4:16 PM
Subject: [filmscanners] Re: Polaroid Dust and Scratch Removal


> Art, you curmudgeon,
>
> I for one read and respect your posts, as they are intelligent if lengthy.
> But I have to take issue with your statement that Nikon manifests problems
> from dust and scratches - the dust and scratches are on the film, not in
the
> Nikon scanner hardware, are they not?
>
> Maris
>
> ----- Original Message -----
> From: "Arthur Entlich" <artistic-1@shaw.ca>
> To: <mlidaka@ameritech.net>
> Sent: Wednesday, May 22, 2002 5:37 AM
> Subject: [filmscanners] Re: Polaroid Dust and Scratch Removal
>
>
> [snipped]
>
> This software is not a replacement for IR cleaning, but then again it
> doesn't really need to be on a Polaroid scanner.  After all, Polaroid
> scanner simply do not suffer from the problems that Nikon's manifest
> from dust and scratches, so why should it be designed to fix Nikon's
> problems?
>
> [remainder snipped]


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