Some (most) lenses have metal screw in rings holding the element in. Some of
thiese rings have no spanner notches. You have
to use either the special tool made just for this or drill 2 small holes in the
ring spaced 180 degrees.
John
Stuart Goggin wrote:
>
>
> Hello All,
>
> Sorry to be asking so many repair questions,
>
> I have a 50 f1.4 lense with fungus on an inner element. I pulled apart
> and fixed a sticky diaphram and removed the dust in an 50 f1.8 yesterday,
> and would like to have a go at cleaning the fungus from the 1.4. I agree
> it would probably be a good idea to have this fixed professionally, but as
> this would cost around $50, where I got the lense for nothing, I would
> really like to attempt this myself.
>
> I have managed to remove the front name plate ring and the filter ring
> itself. From here I have no idea on how to proceed. The f1.8 used three
> screws to completely remove the front element group. The 1.4 does not have
> any screws. I think the front group is probably on a thread, but I don't
> want to risk putting it out of alignment?
>
> Any help appreciated.
>
> Stuart Goggin
>
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