A full aperture but leaves seen in Biogon

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Hi! Is it normal that aperture leaves are seen a little bit at f2 in Biogon 35/2 ? Picture attached.

 

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Earlier I have met same in my old Hasselblad Zeiss Planar 80mm.

I just got this Biogon ZM lens sended from UK. It looks hardly used, minty, and I paid 450£. (Somewhat surprised my offer accepted.) But I feel a little loose when sharpen too (when change direction).

Have loosening issues common in Zeiss ZM lenses? Perhaps a camera repairer can fix it with a little money (- or DIY work). Thus I can use it before, but would it propably go worse?

Should I send to Cosina info about Loctite products? 😀

 

[fuwen]

My ZM 35/2 is the same as yours at f2. Looking from the front can see little bit of the aperture blades but look from behind cannot see any. I suppose it is alright and we do not need to do any thing.

 

[mirrored]

My ZM 35/2 is the same as yours at f2. Looking from the front can see little bit of the aperture blades but look from behind cannot see any. I suppose it is alright and we do not need to do any thing.

Thanks. About this way it is here too. But very little blades can see behind too if look from side. I think it is allright.

 

[Tom A]

My 35f2.0 shows the same thing. As for the loose lens barrel - check the retaining ring at the back of the lens (small ring surrounding the back element). There are two "notches" in it and carefully push against it ( as if you were unscrewing or tightening the ring). On the Zeiss lenses these rings can work loose and the lens assembly "wiggles" a bit. Tighten it if it is needed and it should cure the problem. Any camera repair guy would have the tool for doing it and at the same time he can put some LocTite on it. Use the "blue" loctite as the red and purple one will lock it forever and make it impossible to fix at some later date - if the lens ever should need service.

 

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can put some LocTite on it. Use the "blue" loctite

Thank you! I just quess that Loctite would be helpfull! 🙂

 

[mirrored]

My 35f2.0 shows the same thing. As for the loose lens barrel - check the retaining ring at the back of the lens (small ring surrounding the back element).

I took a look on it. You propably mean the ring between focusing part (which moves bodys focus) and back lens. It's located quite deep to narrow gap.

 

[mirrored]

Loose in focus ring is 1/4mm only, if not 1/5mm. Have someone a Biogon without any wobble? I have read here many threads that wobble / wiggle -issue..

It is only in focus ring. Compared to my Summicron 50 (2433465), other way it is very solid, but instead Summicron wobble much in somewhere middle on the lens but not focusing ring. (wobble when I take hold front - don't confuse it to move of bayonet towards body if lens is attached!)

Picture. I cannot move the ring with two tiny screwdriver. Must be special tool for that.

 

[Heinski]

... As for the loose lens barrel - check the retaining ring at the back of the lens (small ring surrounding the back element). There are two "notches" in it and carefully push against it ( as if you were unscrewing or tightening the ring). On the Zeiss lenses these rings can work loose and the lens assembly "wiggles" a bit. Tighten it if it is needed and it should cure the problem.

A few days ago I got my Color Skopar 35 2,5. It feels mechanically better than my new Sonnar 50. I checked the retaining ring of the sonnar and it is tight. But the lens body has a bit to much play when it is mounted to the camera and when I change the direction while focussing it feels a bit loose too. The skopar is absolutely tight - nothing is wiggling and it feels perfect when focussing. Maybe that´s why the lens body is much shorter?

I have no experience with these lenses. My F-Mount Nikkor lenses are wiggling much more but I´m a little bit confused if it is right for a 1000 Euro Lens.

How much play is normal for the zeiss lens, do I have to send it to Zeiss service?

 

[mirrored]

when I change the direction while focussing it feels a bit loose too.

How much play is normal for the zeiss lens, do I have to send it to Zeiss service?

I have just same issue with focusing barrel. It can not be normal (acceptable) but I could live with my. Amount of loose is in my Biogon 35/2 only about 1/4-1/5mm, but when I turn it to infinity, double picture doesn't meet. If I turn it with speed to infinity, I can get precise focus to infinity.

On every other distances it doesn't give any disadvantage.

 

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I don't have find help yet. Repairers (who know Leitz lenses) are only guessing what would help with this, but one who have most experience was not willing to do the job at all but would send it to Zeiss.

Seller of this lens didn't mention anything about that issue. Ebay UK.

 

[reuno]

Same issue with the loose focusing ring and infinity and this pisses me off... Even my "cheap" summicron-c focus way smoother. It really is a shame for a lens i bought 600€ used. Focus seems right but im not very happy using the lens. Sad

 

[mirrored]

Same issue with the loose focusing ring and infinity and this pisses me off... Even my "cheap" summicron-c focus way smoother. It really is a shame for a lens i bought 600€ used. Focus seems right but im not very happy using the lens. Sad

Yes, but I find me forgetting this while shooting. Thus my Biogon 35/2 is traveling to Zeiss (with my ZI body warranty issue) with a inquiry how much fixing would cost.

 

[reuno]

My focusing issues got worse last days, just sent a mail to Zeiss asking how to send them the lens from France. Damn, i was planning to take the lens to New York early July... glad I did not sell the good old Summicron-c.

 

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Yes, but I find me forgetting this while shooting. Thus my Biogon 35/2 is traveling to Zeiss (with my ZI body warranty issue) with a inquiry how much fixing would cost.

Zeiss give me a new Biogon for free! That I would name excellent warranty - outside warranty time and without any papers. 😉

Suddenly I have a new body and lens. 😎