Archived posting to the Leica Users Group, 2009/02/06

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Subject: [Leica] Question about Lens CLA/Cleaning
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Fri Feb 6 01:33:09 2009
References: <8975B6F9-E5B0-42B6-9884-330819820581@telefonica.net>

Depends on how clean the petrol is! Many of the best organic cleaning  
solvents are carcinogenic and have been illegal in the EU for many  
years. It is unlikely to damage the coatings. There are other lab  
solvents which could be used which are safer than petrol.
Frank

On 5 Feb, 2009, at 23:42, Lluis Ripoll wrote:

>
> I've purchased an old Zeiss Jena Sonnar 2/85 the focusing was very  
> tight and I've gave it to a local workshop to be CLA, the glass is  
> in perfect condition but dusty. The man of the workshop will do  
> again the correct lubrication and he said me too that at the same  
> time he will clean the dust, soaped on petrol, I was very surprised  
> and he said me that this is absolutely usual.
>
> Can someone confirm me if this can not affect the fluorite coating  
> of the Zeiss lenses or be maybe damaged?
>
> Thank you very much!
>
> Saludos cordiales
> Lluis
>
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In reply to: Message from luisripoll at telefonica.net (Lluis Ripoll) ([Leica] Question about Lens CLA/Cleaning)