Archived posting to the Leica Users Group, 2010/01/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]FWIW, I haven't used any adhesives on the bayonet screws. Four years ago the 280's flange worked loose. After tightening it with the proper screwdriver, there have been no problems since then. Doug Herr Birdman of Sacramento http://www.wildlightphoto.com -----Original Message----- >From: Spencer Cheng <spencer at aotera.org> >Sent: Jan 30, 2010 9:21 PM >To: Leica Users Group <lug at leica-users.org> >Subject: Re: [Leica] Re-bayoneted Leica R lenses > >Geoff is quite correct. It cost me $150 for Gerry @ Kindermann to adjust >the infinity focus on my 180/2.8 because someone had used an inappropriate >thread adhesive. > >The other suggestion I have is to use bees wax instead of a thread >adhesive. It's not an adhesive but provides just enough friction so the >screw doesn't back itself out. Works on bicycles. :) > >Regards, >Spencer > >On Jan 30, 2010, at 20:18, Geoff Hopkinson wrote: > >> Howard, Spencer has pointed out the different grades of Loctite for you. >> In >> my opinion you should be very cautious about using it on very fine sized >> bolts in your lens mounts. It can be done but be aware of the pitfalls. >> Use >> VERY small amounts of the correct grade. Incorrect tool choice or >> application can easily cause the screws to shear as well and you are >> adding >> to the required force. Invest in some good instrument screw drivers as >> well. >> Actually you can entertain yourself for hours browsing and shopping on the >> specialist sites that sell such tools. >> >> Not meant to scare you, very likely you won't have any problems. I've >> disassembled the M mounts from several Zeiss (Cosina) lenses and they are >> fitted with thread lock and are removable with care. Dependant on the >> fasteners' locations you may want to consider locking them externally >> with a >> tiny drop of lacquer (like the suggested nail polish) instead. That has >> the >> advantages of being more readily removable as well as acting as a teltale >> for any fastener displacement. Plus if you choose the right colour it can >> complement the sparkle in your eyes. >> Cheers >> Geoff (who was a fitter/technician in a previous life) >> http://www.pbase.com/hoppyman > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information