Circular shiny dots under front element - Summicron M 35 v4 German Version

[Martin_35]

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Hello, 

I just received a freshly bought copy of the German Summicron M 35 v4.

During the first check I discovered a weird shiny circular spots placed as I assume on the black metal rim behind the front element. 

The "dots" doesn't change location, so for sure its not a reflection in the glass. My first thought was the Schneideritis, because those points looks like scratches. This is something unfamiliar for me, and maybe someone has any idea what could it be or what could caused it. Also if is possible to affect lens IQ?

Regards 

Martin

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[Kl@usW.]

Seem to be  the pivots of the aperture blades.  Perfectly normal. Count them-there should be as many "flecks" as there are aperture blades. And their spacing should correspond. More miracles ? 

Ha, and welcome to the forum ! 

Edited April 8, 2024 by Kl@usW.

[roelandinho]

Hmm, my 35 mm Summicron v4 (also the Germany version) doesn’t have these spots. I don’t think they should be there. 

[lct]

I own 2 copies of this lens and i can't seem to see those spots on either one.  Schneideritis spots can look like that, but they don't have that regularity so I have no explanation to offer, sorry.

[Kl@usW.]

I think we need better pictures. 

Apart from that: I don't own the V4 , but the V5. If I look very obliquely into the lens, I can just see the pivots. They slide in a groove. Looking more or less perpendicular into the lens , you can  only see  a kind of circular baffle. 

Could it be someone forgot to re-mount the baffle after dismantling the lens, for instance after cleaning the aperture blades ? 

[Danner]

I just carefully studied my Canadian KoB, and do not find any ring of dots like shown in your photographs.

Hope this helps.

Edited April 10, 2024 by Danner

[Martin_35]

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On 4/9/2024 at 10:42 PM, Kl@usW. said:

I think we need better pictures. 

Apart from that: I don't own the V4 , but the V5. If I look very obliquely into the lens, I can just see the pivots. They slide in a groove. Looking more or less perpendicular into the lens , you can  only see  a kind of circular baffle. 

Could it be someone forgot to re-mount the baffle after dismantling the lens, for instance after cleaning the aperture blades ? 

Thank all of you for reply. For me it also look like pivots of the shutter blades, but I do not how it could be possible to have just few of them visible like that. It looks more like some pivots scratched the "blackened ring". 

Except of that its probably just an aesthetic flaw, lens works perfectly fine. Probably I will figure out what that is with the next CLA.
 

[davidmknoble]

If you don’t have 6-bit coding you might consider it and get the lens cleaned and checked at same time?  I just sent a chrome version in to do that and just get a CLA.