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[OM] Re: Auto Bellows question

Subject: [OM] Re: Auto Bellows question
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Tue, 14 Dec 2004 08:32:51 -0500
Once the block(s) crack, you can't lock the standard.

John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
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----- Original Message ----- 
From: "Jeff Keller" <jrk_om@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Monday, December 13, 2004 11:55 PM
Subject: [OM] Re: Auto Bellows question


>
> Going from memory I didn't recall that the bellows lens mount had any more
> resistance than the camera. I just now went and checked it and found it 
> does
> have enough more resistance that it is easily noticed when compared side 
> by
> side with a camera. I also checked my telescoping extension tube and found
> it had about the same resistance as the bellows but it was less noticeable
> because the lens is easier to grab. Looking at the bellows lens mount it
> appears that there are springs on the side opposite the lens which push
> against the "ears" of the lens bayonet, pulling the lens up against the
> front surface of the mount. I suspect since the bellows gets much less use
> than a camera, the springs are stiffer. I didn't find my bellows hard to
> mount a lens to, but it does have more resistance than my camera. I tried 
> to
> look at the surface of the three flat springs to see if I could tell where
> they rubbed against the lens ears but couldn't see them well enough to
> determine anything. If the surface of the lens side of the mount or the
> surfaces of the springs were rough, it might be pretty hard to turn the
> lens.
>
> The rail of my bellows has no lubricants, and has a slightly rough finish
> from the machining. The gearing itself is fairly stiff. With the lock 
> screws
> loose it moves smoothly but takes effort to turn the knobs. It looks like
> the surface of the bellows' rail is rough enough that it could wear down 
> the
> nylon guides but it would take a lot of use to do that. Other than the 
> nylon
> just wearing away, I can't see anything that would cause it to slip.
>
> Good luck getting to the bottom of it,
> -jeff
>
> ----- Original Message ----- 
> From: "Glenn Stauffer" <alaxsxaq@xxxxxxxxx>
> Subject: [OM] Re: Auto Bellows question
>
>
>>
>>
>> I checked the clamp and it looks fine - the plastic shows what might
>> be some cracking from flexing, but the cracks don't appear to go all
>> the way through.  The thumb screw pushes against a metal plate, so
>> there isn't a hole there.  Maybe I just didn't have it tight enough.
>>
>>
>> In your experience, should the lens be as easy to mount onto the
>> bellows as onto the camera itself?  The mount on the bellows is
>> definitely tighter than the camera mount.  I can't see any reason why.
>> Everything appears normal, though there are wear marks around the
>> outside edge in a few spots that makes me think something isn't right
>> with this one.
>>
>> The person who sold this to me guaranteed it.  I might have to test
>> the guarantee and return it for a refund.
>>
>> Glenn
>
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