Thanks Alan.  This is great.  It is exactly the information I was looking for!

Thanks for your help.

Village Idiot 



> --- Village Idiot <[EMAIL PROTECTED]> wrote:
> > What are the tools and steps needed for me to clean this lens properly?
> 
> Usually dust gets inside between the front and the rear element group, the 
> space
> where the aperture blades is. You can get there from the front or from the 
> rear.
> From the front, you need to unscrew the retaining ring (#1), 3 screws (#2) 
> and 
> then
> the front element group itself (#3). Use a rubber blower to blow off the dust 
> and
> job done.
> http://www.pbase.com/wlachan/image/41193715.jpg
> 2 things you need are low strength threadlock (threebond 1401) for the 3 
> screws 
> (#2)
> and the proper lens wrench. The retaining ring itself doesn't require 
> threadlock 
> or
> you won't be able to get it off again in the future.
> http://www.pbase.com/wlachan/image/41194481.jpg
> To work from the rear, you only need the wrench to remove the rear element 
> group.
> However, due to the tight working space, it requires more skill to work 
> properly 
> w/o
> leaving tool marks. A piece of rubber be used instead of the wrench depends 
> on 
> the
> situation in both cases.
> 
> Alan Chan
> http://www.pbase.com/wlachan
> 
> 
>               
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