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How tight should the aperture ring on a 5cm Elmar be ?
Old 01-01-2020   #1
Moto Mark
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How tight should the aperture ring on a 5cm Elmar be ?

When I change the aperture ring on my 5cm Red Scale Elmar I have to hold the outer ring with one hand and use the fingernail on the other hand to turn the aperture ring.

It has a lot of resistance on the ring, is this normal ?
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Old 01-01-2020   #2
p.giannakis
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In mine, the focusing ring rotates very smoothly but the aperture ring has some resistance to it but not too much. I always thought that it feels fine.
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Old 01-01-2020   #3
Erik van Straten
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When the aperture is turned, the barrel should not move. Sometimes a very little bit of sewing machine oil helps. If not, the lens must be professionally cleaned.


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Old 01-01-2020   #4
VictorM.
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The control on mine has just a little resistance. Here's an interesting video (I haven't tried to 'fix' mine because it aint broke):

https://www.youtube.com/watch?v=mQf01iHqf-I
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Old 01-01-2020   #5
Moto Mark
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Thanks Victor, it was that same video that got me thinking I might have the same issue.

At best Iíd try Erikís suggestion and use sewing machine oil but thatís as far as Iím capable of going.
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Old 01-01-2020   #6
Ambro51
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Little lighter fluid will loosen it, then a drop of sewing machine oil
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