> Was looking at a remote shutter switch, specifically the
> Canon RS-60E3, which has mixed reviews/user comments
>
> Am I right in thinking this is simply a passive two-stage
> push-button and a stereo plug ?

I believe so.  The only difference between models is the
camera end connector used -- higher end Canon cameras (e.g.
EOS 5D) use a uncommon 3-pin female round connector.

Given that the polarity and required inter-pin resistance
may vary, I'd use a small relay with low-current contacts
(instead of semi-conductors) to make & break connections.

						Lee

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