Re: Inferring that a Camera is a SLR?

Yuzhong Qu wrote:

> > Here is the piece of knowledge that I am trying to use to make the
> > inference:
> >
> >     "Only SLRs have a ThroughTheLens viewFinder"
> >

Point of information - as someone has already said, the above statement
is false in the real world - there are also Twin-Lens Reflexes (which
you may or may not regard as having a through-"the"-lens viewfinder,
since there are two identical lenses. Various large-format cameras might
also be regarded as having such a viewfinder, depending on definition.
There are also single-lens non-reflexes, e.g. one of the Canon EOS range
(EOS 600 RT??) which had a fixed half-silvered mirror.

Cheers,

David.

-- 
Dr David N Allsopp
Distributed Technology Group
Advanced Processing Centre
E211 QinetiQ Malvern

unclass: d.allsopp@signal.qinetiq.com
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Received on Friday, 25 April 2003 04:19:03 UTC