re: Intro (bio) Canon

[Jim MacKenzie <aa279@xxxxxxxxxx>]

On Thu, 6 Feb 1997, Russell J Rosener wrote:

> The Canon A-1 should have no problems at all with IR film. The problem is
> that some of the newer autofocus EOS cameras use an IR beam to focus, and
> it can fog the film. Check the IR FAQ at Willem's homepage for info on
> which EOS to worry about.

Just to correct this pretty informative post, the newer EOS cameras use 
an IR film-advance mechanism, rather than a mechanical one which counts 
perforations.  This fogs the area adjacent to the perforations on one 
side of the film.

Older EOS cameras do not do this; no manual-focus cameras do this to my 
knowledge; no Nikons do this; I don't think Minoltas do this either.

Jim


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