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Re: [OM] Vivitar 2x-teleconverter for Hasselblad: RESULTS

Subject: Re: [OM] Vivitar 2x-teleconverter for Hasselblad: RESULTS
From: Ken Norton <ken@xxxxxxxxxxx>
Date: Mon, 16 Mar 2009 09:55:09 -0500
>
> I just tried it again but actually resized the image.  At 25% the grain
> appears to be gone.  Re-enlarging back to original size shows some
> weakened grain is still there but you just can't see it at the smaller
> size.
>

The numbers are a little different, but this is a trick of the trade I use
when digitizing film images.  I know what I can squeeze out of my E-1 images
at a lowly 5MP, so if I take a huge scan (48MP or so), apply a tiny bit of
gaussian blur (a poor man's AA filter), then downsize to 25-50% of original,
then sharpen I get images at a nice manageable size and the grain structure
is greatly minimized.

But I will say that a well-done scan of K25 at 4000dpi is something to
behold.

AG
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