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Re: [OM] (OM) Filters binding on the front of a lens

Subject: Re: [OM] (OM) Filters binding on the front of a lens
From: "Piers Hemy" <piers@xxxxxxxx>
Date: Thu, 28 Oct 2010 17:42:32 +0100
My only recommendation in this case, Brian, is to use both hands on the rim
of the filter, but interlaced (as it were) so that thumb and forefinger of
each hand are opposite one another, with one pair at a right angle to the
other - that way you are exerting reasonably equal and controllable force at
four points around the rim, and not tending to force the rim into an oval
shape.  It has worked for me with precisely that problem with polarising
filters.

For the future, I suggest some PTFE plumbers thread-sealing tape. I know
(from a past exchange on this list) that Moose believes it does not work,
but in the case of my cheap stepping rings from China, what I see tells me
that it probably does.

Piers

-----Original Message-----
From: Brian Swale [mailto:bj@xxxxxxxxxxxxxxx] 
Sent: 28 October 2010 15:49
To: olympus@xxxxxxxxxxxxxxxxx
Subject: Re: [OM] (OM) Filters binding on the front of a lens

Andrew wrote
> 
> Place palm of hand over the filter and turn - or place lens nose down 
> on a mouse mat and turn. It works 90% of the time (tested 
> exhaustively, records kept). Andrew Fildes afildes@xxxxxxxxxxxxx
> 
> On 28/10/2010, at 4:35 PM, Moose wrote:
> 
> > The trick is to hold it lightly and at several points around the 
> > perimeter when  unscrewing it. That's how you find, create, really, 
> > the "sweet spot". Or get a proper size filter wrench, which grabs  
> > evenly all the way 'round.

I was and am aware of the principle of putting a rubber flask stopper  (or
sticky skin) over a jammed filter.

However, Circ-Pol filters incorporate a really good  " gotcha ".

They are two-part, and the front part rotates *very* freely. 
If you want to get wound up, try rotating one of these for all eternity !!  
There is no alternative to working on the narrow ring behind the front one.

My photo shop does not use filter wrenches. They claim that that filter
wrenches make more problems than they solve, and I reckon they know what
they are talking about.
Mine from HAMA broke years ago, and I have never seen new ones since.

I hear what you say, Moose, about wax, but I'm not sure that I agree with
you that the wax will fill the space between threads and cause binding. The
result should be that it is like filling the space between the sole of your
shoe and the pavement with a fresh banana skin.  Oops, here we go !!

I'd like to see John Hermanson's advice on lubricating these filter threads.

Brian Swale. 
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