Foolproof - Everyone finds immediately the shutter

The trigger button I bought a Fujifilm X20.
It fits perfectly into the thread and can be tightened a little harder with feeling, then it no longer dissolves.
(Ev. A small drop of nail polish draufmachen before screwing a thread lock if one suffers from too great a fear of loss.)
The "Red" is wonderfully matched by very well-fitting, old-fashioned color, to the retro look of the camera.

Practical to use - unbeatable when "foreign" people should take a snapshot - and pretty to look at can be a pretty hefty price to forget quickly.

Not grouses, buys! :-)