Re: Re: enlarging paper negatives

they're actually easy to come by. a company called artograph makes a bunch
of different models. i have a really cheap one that i got from A.C. Moore
(a craft store chain in the US) for about $7! it works but the lens
obviously isn't as good as the kind you'd find in an enlarger or something.

rob

> From: Jeremy Siemens <jaramecium@yahoo.com>
> Reply-To: pinhole-discussion@pinhole.com
> Date: Tue, 13 Nov 2001 10:48:53 -0800 (PST)
> To: pinhole-discussion@pinhole.com
> Subject: [pinhole-discussion] Re: enlarging paper negatives
>
> In the past I have thought of ways to enlarge paper
> negatives, but never got around to it (I just decided
> to build cameras that will take bigger paper
> negatives).
> One idea that I did have was to use a special
> projector that can project images from "opaque"
> sources. These projectors really exist, my highschool
> art class had one (we used it to enlarge images from
> books and project them onto the wall). They work like
> overhead (transparency) projectors, but instead
> transmitting light through the image, they shine a
> bright light upon the image and a lense system
> focusses the reflected light onto the wall. The
> resulting image would not be as bright as an overhead
> projector, but in a dark room we could see the image
> clearly.
> In theory, one could use such a device to enlarge
> paper negatives. The only challenges I can forsee are
> that there is some light leakage from the projector
> (this may cloud your unexposed paper) and I think
> these projectors are hard to come by (I've only seen
> two in my life, and they were both old).
>
> Just some thoughts,
>
> Jeremy
>
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Received on Tue Nov 13 16:27:06 2001