Re: [OM] Tinkering with a f1.8 Zuiko

[Russ Butler]

NSURIT@xxxxxxx wrote:
> If I have something worth fixing it goes to Camtech, however I just  
> received a 50mm f1.8 and the aperture blades will not move on at all and also 
> a  
> 28mm f2.8 that has slow aperture blades.  Neither of these are lens upon  
> which I would pay to have a CLA.  Any words of advice from those who have  
> traveled this road about traps to be aware of when opening these guys up?   
> What 
> method works best for getting the blades cleaned and working.  I might  
> mention the the 28mm doesn't appear to have any oil on the blades.  They  are 
> just really slow.  Bill Barber

I had really good luck on a 50/1.8 & 50/1.4.

First I gently heated the lens with a hair dryer to see if gummed up 
lube might be the problem. It was on these two lenses as the blades were 
less sticky when warm.

So I removed the base of the lens and applied some CRC QD Electronic 
Cleaner using very tiny "Microbrush" brushes I bought at a local hobby 
store. (The tips are ~1mm diam x 2mm long). iirc (it's been a few years) 
I just applied the "QD" a tad here and there to where I figured the lube 
had gummed up over the years, worked the blades and repeated a few 
times. The QD apparently redissolved &/or redistributed the original 
lubricant.

Worked for me. YMMV.

-- 
Russ Butler (NJ USA)


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