My parts arrived today and I knocked together
a shutter lock for my TL120. It's dirt-simple
but I think it will fit my needs.

Photos and fancy text are available at:
http://stereo.thurstons.us/ShutterLock.htm

In simple terms, I threaded an over-sized button
into the cable-release socket. When it is screwed
all the way in, the button can't be pressed far
enough to trip the shutter. By backing it out
one turn (or unscrewing it completely) the
shutter works normally.

I used a dremel tool but a drill press or
a little mill would have made my job faster
and the end-result neater.
________________________________________
John Thurston
Juneau, Alaska
http://stereo.thurstons.us