What's this screw on LX

[Tonghang Zhou]

There's a small thumb screw next to the shutter
curtain on the LX when you open the back.

Does anyone know what this for?  Thanks.

Tonghang
-
This message is from the Pentax-Discuss Mail List.  To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .