digital cameras

From: Fred Cisin <>
Date: Wed Jul 14 11:49:02 1999

When using the 55P/N Polaroid film (the stuff that gives you a negative in
addition to a print), I found that the optimal exposure for the
negative required more than a complete stop more exposure than the optimal
exposure for the print! Did they ever fix that?
BTW, that was also using a 545 back on a Linhof, but I am NOT Richard.

Grumpy Ol' Fred
On Wed, 14 Jul 1999, Richard Erlacher wrote:
> I have little experience with Polaroid since the '60's when I occasonally
> used a Polaroid back for my 4x5 (9x12 cm) Linhof.  Since then I've only used
> Polaroid for 'scope pictures.
> However, what I do recall is that while they're OK for use as full-scale
> snapshots, the film is too grainy for enlargement.  I learned about this
> when I used the negative film from Polaroid.  I've concluded that the
> quality of the photos from this technology is not as high as what's wanted
> by users of digital photography in general, i.e. I doubt it's up to the
> quality of the 640x480 resolution of the Sony cameras.
> My interest in digital photography has been stimulated by the need to
> integrate photographs into technical documents and correspondence.  There's
> plenty of software for rendering the color photos as what they are, up to
> "glossy-paper-magazine" e.g. Time or Spiegel but once you start to enlarge
> the image, the lack of resolution becomes a major factor.  I've considered
> other image processing approaches, e.g. scan-rate conversion software which
> reduces a raster image to Fourier series in both directions, thereby
> allowing you to "fit" the image to whatever resolution you like, though it
> requires post-processing to straighten and sharpen edges, etc.
> What really puzzles me is whether it can process and render a photo as black
> and white line-art.  Anyone have
> experience with this?
> Dick
Received on Wed Jul 14 1999 - 11:49:02 BST

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