I'll think about having to excuse you as soon as I speak perfect
Spanish... and perfect English too.
Chuck Norcutt
Fernando Gonzalez Gentile wrote:
> horrid English grammar on second lecture - excuse me , list.
>
> Fernando
>
> Fernando Gonzalez Gentile wrote:
>> Same warning.
>>
>> The most reputed repairman in Montevideo, told me more than once that is
>> not a common grease.
>> My 21/3,5 suffers from the opposite illness, fortunately not in the
>> aperture ring but in the focusing ring: it is rather loose, 'though I
>> can perfectly use the Zuiko. Asked more than once if he could fix this
>> almost non-issue, but he refused; alleging that kind of lubricant was
>> very difficult to find here in town. I suppose both the aperture ring
>> and focusing ring use the same type of lubricant.
>>
>> FWIW
>>
>> Fernando.
>>
>> Chuck Norcutt wrote:
>>
>>> A warning that I'm overstepping my bounds here but, from looking at the
>>> parts diagram, I would agree that it looks as though the aperture ring
>>> should simply slide off. If the grease has solidified to the point of
>>> preventing the ring from turning (as Mark's note hypothesized) then I
>>> would not be at all surprised that it's that same solidified grease
>>> that's acting as a glue between the two parts and also preventing you
>>> from sliding it off as well as turning it.
>>>
>>> If it were me I would very gradually feed some drops of a solvent such
>>> as Ronsonol lighter fluid around the inner diameter of the aperture ring
>>> and perhaps on its back face. Also maybe a drop or two in the groove
>>> that appears to slide over the actuating pin Mark mentions. Just don't
>>> use so much that it ends up dripping and running inside the lens.
>>>
>>> If the grease is totally dried out and has evaporated off all of its
>>> volatile components I'm not sure warming can help much. It probably
>>> does need a solvent to loosen it up.
>>>
>>> On the other hand I think this is a very expensive piece of glass... so
>>> ignore what I just said. :-)
>>>
>>> Chuck Norcutt
>>>
>>> Alan Wood wrote:
>>>
>>>
>>>> In 2001, Mark Dapoz kindly provided some advice:
>>>>
>>>> Chances are that the grease around the aperture ring has solidified
>>>> and is preventing it from turning. Use a rubber stopper to twist the
>>>> front part of the lens off, it's just a big retaining ring. The
>>>> aperture ring should then easily come off. You will then see a
>>>> little pin sticking out from the barrel. Try moving that pin, it
>>>> should move freely and close the aperture. If it doesn't then you
>>>> have other problems and it's best to get the lens CLA'd. If it does
>>>> move freely, just clean up the grease on the aperture ring and
>>>> re-lube it using an appropriate grease.
>>>>
>>>> ----------
>>>>
>>>> It has taken me 7 years, but I have finally managed to unscrew the
>>>> front ring (the one that says ZUIKO MACRO etc.). Now I cannot get
>>>> any further. The aperture ring (the first knurled ring) will not
>>>> come off. I have tried gently warming it.
>>>>
>>>> Please does anyone have any suggestions for loosening it? Maybe a
>>>> solvent?
>>>>
>>>> Thank you
>>>>
>>>> Alan Wood http://www.alanwood.net (Unicode, special characters,
>>>> pesticide names)
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>
>
>
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