Re: [OM] Permanent OM to EOS conversion

[Chuck Norcutt]

RT stands for "Real Time".  Instead of the standard flip up reflex 
mirror the RT used a beam splitter called a "pellicle mirror".  The 
pellicle mirror is stationary.  Since there was no moving mirror the 
shutter didn't have to wait for the mirror to go up and it could just 
fire instantly. In a conventional SLR the mirror hitting the top of its 
travel is what releases the first shutter curtain.  The second curtain 
closing is what releases the mirror to come back down and that in turn 
releases the wind lock.  That's also why you can't wind on an OM whose 
battery has died and left the mirror in the up position (by design).

<http://en.wikipedia.org/wiki/Canon_EOS_RT>

Chuck Norcutt



AS wrote:
> What is "EOS RT"?
> 
> 
> 
>       
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