Contax Zeiss 35-70 - Issues with front of lens, thoughts?

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thebratts
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p.1 #1 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Hi there
I have a Zeiss 35-70 (3.4) zoom.
Recently i discovered that the front part of the lens can be moved in and out about 2-3 mm
The outmost part e.g holding the lens by the zoom ring in one hand and then put some fingers on the outer part of the front of the lens i can drag the front in and out...
Since the whole front lens moves with it, as you can imagine the focus changes..

Anyone have any ideas on how to fix this.
The lens is in good shape otherwise, has not (that i know of) been dropped or anything.

Oct 30, 2012 at 10:39 PM

jotdeh
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p.1 #2 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

thebratts wrote:
Hi there
I have a Zeiss 35-70 (3.4) zoom.
Recently i discovered that the front part of the lens can be moved in and out about 2-3 mm
The outmost part e.g holding the lens by the zoom ring in one hand and then put some fingers on the outer part of the front of the lens i can drag the front in and out...
Since the whole front lens moves with it, as you can imagine the focus changes..

Anyone have any ideas on how to fix this.
The lens is in good shape otherwise, has not (that i know of) been dropped or anything.

That sounds like a repair / cleaning gone wrong...

Oct 30, 2012 at 10:51 PM

thebratts
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p.1 #3 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Hmm. Well. Don't know about that, i have actually used the lens for a while without noticing... Strange.

Does anyone here know where one could find some instructions on how to service/dissemble the lens?

Oct 31, 2012 at 11:22 AM

alundeb
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p.1 #4 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Mine does the same, I don't see it as a problem, guess it is just part of the push-pull zoom design.

Oct 31, 2012 at 04:30 PM

thebratts
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p.1 #5 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Alundeb. Are you sure so you can move the front part of the lens in and out. Don't you have problems with focus on occasion then since the outmost lens moves with it?

Oct 31, 2012 at 09:51 PM

jotdeh
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p.1 #6 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

I checked out mine now - it does the same. I did once drop mine though.

Nov 01, 2012 at 01:20 AM

alundeb
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p.1 #7 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

thebratts wrote:
Alundeb. Are you sure so you can move the front part of the lens in and out. Don't you have problems with focus on occasion then since the outmost lens moves with it?

I can move it 2 mm.

Gotta be careful and not touch it after focussing.

Nov 01, 2012 at 08:25 AM

photomadnz
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p.1 #8 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Mine did that then got a little worse and started showing focusing issues depending which side it moved. I took it in and theres 3 easy screw to tighten underneath which work there way loose. Very easy fix, he did it while I waited.

Nov 02, 2012 at 03:10 AM

timballic
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p.1 #9 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

photomadnz wrote:
Mine did that then got a little worse and started showing focusing issues depending which side it moved. I took it in and there's 3 easy screw to tighten underneath which work there way loose. Very easy fix, he did it while I waited.

"there's 3 easy screw to tighten underneath" Which three screws, underneath what?

Nov 17, 2012 at 11:23 AM

jotdeh
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p.1 #10 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

timballic wrote:
photomadnz wrote:
Mine did that then got a little worse and started showing focusing issues depending which side it moved. I took it in and there's 3 easy screw to tighten underneath which work there way loose. Very easy fix, he did it while I waited.

"there's 3 easy screw to tighten underneath" Which three screws, underneath what?
Do you still remember? Please share

Mar 02, 2013 at 09:07 PM

LightShow
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p.1 #11 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

Under the grip?

Mar 03, 2013 at 08:03 PM

jotdeh
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p.1 #12 · Contax Zeiss 35-70 - Issues with front of lens, thoughts?

LightShow wrote:
Under the grip?
The focus grip? No, there are two screws that hold a little plate that sets the focus limit, and two cam screws with nylon washers.
When I remove the front lens the wobble is still there (in the helicoid).

Mar 03, 2013 at 09:04 PM

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