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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: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Thu, 28 Oct 2010 14:58:06 -0400
If you're going to use tape put a thin ring of tape around the perimeter 
of both halves of the filter so they can't move relative to each other. 
  Then use a rubber gripper around the periphery or against the front of 
the rim.  Should work just find I should think.

Chuck Norcutt


On 10/28/2010 12:42 PM, Piers Hemy wrote:
> 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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