[rollei_list] Re: Spinning front taking lens and postings

  • From: Richard Knoppow <dickburk@xxxxxxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Wed, 28 Dec 2005 06:01:24 -0800 (GMT-08:00)

-----Original Message-----
>From: Ruddy Roye <leicauser503@xxxxxxx>
>Sent: Dec 27, 2005 11:06 PM
>To: rollei_list@xxxxxxxxxxxxx
>Subject: [rollei_list] Re: Spinning front taking lens and postings
>You know all I need is a straight forward, layman, 1,2,3 answer. I 
>really do not know this stuff. And if it is going to save me a trip to 
>the West Coast to find out that ?.. then this is why I ask people who 
>are more knowledgeable about the stuff than I am.
>I know that there is a lot of the guys here with varying sense of 
>humors, me, I rock with the punches. Sometimes a little thin skinned 
>but I can rock with the best of them.
>However, when I am lost then things just don't come across for me, for 
>instance, I play trombone, not piano
>and I suffer from vertigo so I hate spinning.
>So again I would be obliged if someone has ever experienced  a spinning 
>front element on their camera.
>On Dec 28, 2005, at 1:42 AM, Richard Knoppow wrote:
   I have not on any lens. However, I explained, in my previous post,  what 
might have happened.  Check the retaining ring on the front of the lens. This 
is the part that usually has the name and other data on the lens. Its purpose 
is to clamp the front element in place. In most lenses, but not all, the 
retaining ring screws out. On Schneider lenses it usually has slots in it, on 
Zeiss lenses there are no slots. If the retaining ring is so loose that the 
element can be turned it can probabl be turned by finger pressure. The correct 
tool for the slotted kind is a spanner made from sheet metal by filing it so 
that there are two blades to engage the slots. Adjustable spanners are too 
unstable and likely to slip and scratch the lens. Retaining rings without slots 
are turned by a friction wrench. This is just a tube the right diameter with a 
ring of sticky rubber on the end. 
   I am concerned that if the ring is loose it means someone has at some point 
had the front element off. About the only reason for doing that is to clean the 
air space inside the front cell, something which should not be necessary on a 
camera as late as the GX. Since the element spacing is critical to lens 
performance the loose retaining ring may be causing image degradation. Because 
it suggests the camera has been tampered wtih I suggest getting it examined by 
a good Rollei repair person. 

Richard Knoppow
Los Angeles, CA, USA
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