Canon 24-105 loosening up when pointed down

Mine were turned a half quarter turns and there was an improvement (a little). It stays on wide zoom but when the lens is shaken when walking, it creeps half way. I do not want to go further, I am afraid of damaging some internal parts on it. Guess I still have to do the safest way... lensbands.

EdIT: Out of the topic. I already took off the front elements glass of my 24 105 for cleaning before. Will clean it again and try to figure out if there is another way to tighten it up. I'm confident on removing the front glass but when it comes to little screws (especially if I do not the reasons fo them being there), I tend to back off very often. Cheers.

I have watched a youtube video about disassembling the canon 50 1.4. A part of it is discussed on the railings and guides of the barrel. Here,s whwt I suspect. The screws were the ones holding the plastic guides along the barrel railings, so for those who were successful might have turned the plastic guides as well when they tightened the screws. I am thinking that if Ill loosen the screws a bit and turn the white plastics we see on the hole might increase the friction between the railings and guides. But something is holding me back, I do not know how short the screws are and I fear from accidentally detaching them if I loosen the screws. These is only my assumption, I dont want you guys think that it is the solution. If you'll carefully look at the video, the screws and plastic that we see on the hole are somehow similar in appearance. Again, it is only my assumption. Here is the link of the video.
http://www.youtube.com​/watch?v=ED0DQpVnTuM

We can see here where are the screw to tighten >> far inside the barrel
https://www.youtube.co​m/watch?v=hFR7ZG341kQ
https://www.youtube.co​m/watch?v=mRUTrNoDD1M

Reservoir Dog wrote in post #17162166
We can see here where are the screw to tighten >> far inside the barrel
https://www.youtube.co​m/watch?v=hFR7ZG341kQ
https://www.youtube.co​m/watch?v=mRUTrNoDD1M

I have no guts on that... I am very curious of the purposes of the screws on the focusing ring. But I guess I really have to deal with lensband alone.

Jiggo0109 wrote in post #17162584
I have no guts on that... I am very curious of the purposes of the screws on the focusing ring. But I guess I really have to deal with lensband alone.

Me too, and i'm sure i will not be able to put it back or strangely i will have to much screw left on the table when finished to mount it ... so for me lensband too

I tried the lens band and hated it. It was hard to move on and off at a given focal length so it was difficult to get it to lock right where I wanted it. That's why I use the two O-ring method I mentioned above. The small O ring stays in the groove... and the larger O-ring rolls in and against the smaller one. It gives a positive lock in any zoom position.

I use a 2 3/16x2x3/32--- #89 O-ring for the small one and a Culligan OR-233 for the large one. You can get both at most Ace hardware stores or most any other good hardware store.

Another advantage: you have to look real close to even see they are there.

I enquired with Canon to see if the Zoom creep could be corrected on the 24-105 and if it was normal and was told it could be corrected if the lens was sent for servicing. A small fortune later the lens came back with worse creep than it had before servicing, it went back to them again and came back no better. Further conversation with the service agent was along the lines that it was tightened as much as it could be within permitted tolerances and creep was normal so the message is clear lens creep on the 24-105 can not be cured. It would also suggest that tightening any screws yourself to the point where creep stopped would be beyond the recommended tolerance limits so is probably a very bad idea. It cost me a small fortune to get to this point so the two lessons are, the 24-105 will creep live with it or use a lens band, and do not take at face value what a Canon rep tells you. They gave me a false steer resulting in an expensive and totally unnecessary servicing bill!

Neil

I know it's an old thread but I'm back with this as it still bothers me... I've tried the rubber wristband (the only one I have right now). Doesn't work.
I tried to have it at different places on the lens but nothing works.

HOSTED PHOTO
please log in to view hosted photos in full size.

Phoenixkh wrote in post #17163202
I tried the lens band and hated it. It was hard to move on and off at a given focal length so it was difficult to get it to lock right where I wanted it. That's why I use the two O-ring method I mentioned above. The small O ring stays in the groove... and the larger O-ring rolls in and against the smaller one. It gives a positive lock in any zoom position.

I use a 2 3/16x2x3/32--- #89 O-ring for the small one and a Culligan OR-233 for the large one. You can get both at most Ace hardware stores or most any other good hardware store.

Another advantage: you have to look real close to even see they are there.

Do you have a picture to share that shows how you did this?