>Alan wrote: > No, the 3 screws you can see on the barrel should not be touched. If the > focus ring is loose when not rotating, you can tighten it by 3 tiny screws > hidden underneath the focusing rubber (closer to the rear end).
By focusing rubber,do you mean the long knurly rotating piece.If so how do you remove it to get to the screws. >If you mean > the focus ring feels loose when rotating, there is nothing you can do. It is > due to the loss of heavy grease due to age and regular use on inner > mechanisms. Since this lens is a bxtxh to service (although not as bad as > A35-105/3.5 which was a nightmare to service), I would not recommend you > tried relubricating it yourself. Yes it feels loose when rotating.My M 135 and M 150 have this large knurled focus ring and are quite stiff.I have no problems with those two moving focus on me,just the SMC-PENTAX A 70-210 f4. Dave > > Yours regards, > Alan Chan > http://www.pbase.com/wlachan
