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[OM] Re: focus and ? about lens filters

Subject: [OM] Re: focus and ? about lens filters
From: John Hudson <OM4T@xxxxxxxxxxx>
Date: Wed, 09 Jan 2008 20:49:03 -0400
WINDEX ............... on a camera lens !

Tell me that you wouldn't do that !

jh


----- Original Message ----- 
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Wednesday, January 09, 2008 8:42 AM
Subject: [OM] Re: focus and ? about lens filters


>I never wipe a dry optical surface.  After blowing off whatever is loose
> I use multiple cotton swabs which are fairly well saturated with alcohol
> or Windex to gently loosen and pick up the fine grit.  The particles may
> look like flour but on a microscopic/optical scale they're rough
> boulders.  Just don't use so much liquid that it starts flowing into the
> lens cell.
>
> Chuck Norcutt
>
> Wayne Culberson wrote:
>> A few years ago we were on the Altiplano of Bolivia during one of the 
>> driest
>> parts of the year. They were constructing a new road across the plain 
>> from
>> Oruro toward the Chilean border. The dust was just unreal, especially 
>> during
>> several hours of driving through this construction and another days drive
>> across the Altiplano on dirt trails. At the time I was using a Vivitar 
>> 28-80
>> zoom lens on an OM, with a UV filter for protection. I thought I was 
>> being
>> very careful in blowing off the dust, and gently huffing and wiping dust 
>> off
>> the filter, an exercise that had to be done several times a day. After 
>> about
>> 3 days of this, with careful inspection, I noticed the damage. The filter
>> was ruined. If not for the filter, it would have been the front element.
>>
>> This is only filter I've ruined that way. I've ruined another one on an
>> Olympus RC; cracked it.... another story. Sometimes a protection filter 
>> is
>> needed. Most of the time, I never use one.
>>
>> Wayne
>>
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>
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