On 1/10/06, Simon Worby <simon@xxxxxxxxxxxx> wrote:
>
> John Hermanson wrote:
>
> > Sometimes it can be cleaned out, [...]
>
> I have "inherited" 4 lenses, all with fungus:
>
> 50 1.8 major fungus damage
> 28 2.8 major fungus damage
> 135 2.8 minor damage except on rear element which is bad
> 35-105 3.5~4.5 front and rear elements; rest difficult to guess but
> looks okay
>
> Clearly the 28 and 50 are beyond economical repair. But I'm not sure
> about the 135 and the 35-105.
>
> I bought a set of tools and I've had the 50 apart as a guinea pig. The
> aperture was also sluggish. It's even back together now, but the fungus
> on the front element (group) in particular appears to go between some of
> the lenses and is not accessible. But it's a great improvement, cleaned
> just with alcohol.
>
> I'm considering tackling the others, based on the fact that I have
> little to lose. But the 135 looks a little more difficult, and getting
> the rear element out looks like it's going to be tricky.
>
> If I'm going to try, what is the best solution to use to try to clean
> the lenses up with (i.e. to get rid of the fungus)?
>
> Also, bearing in mind that the 35-105 would be worth more than a
> professional clean will cost (assuming it comes out right), is it worth
> sending it off?
>
> Thanks,
>
> Simon
I guess it would depend on whether you figure into the equation the
amount of money already tied up in the 35-105. If you got it free or
don't count it, I would think the lens in good working order is worth
no less than $200, perhaps more if the almighty cosmetics are good.
But I'm going to advocate simply to return a champion to the fold.
The 35-105 has been one of my favorite lenses. If you don't need f2.8
or greater speed, it is very hard to beat. I would probably get rid
of every prime in that range before letting mine go. But I grew up
with zooms and love 'em.
Joel W.
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