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Carl Zeiss Jena Flektogon 2.8/35 (silver, m42, late 50s)
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PostPosted: Mon Jan 26, 2009 8:00 pm    Post subject: Carl Zeiss Jena Flektogon 2.8/35 (silver, m42, late 50s) Reply with quote

Ok I couldn't resist and put it on my 5D Smile
Wide open it produces a fogy image, inner elements has something on them I don't know what are they exactly but can be haze, when stopped down it produces nice result.

As usual full size 5D images:
http://www.flickr.com/photos/yalcinaydin/sets/72157612976530129/

first two are f:2.8 results, the last one is at f:8:




PostPosted: Mon Jan 26, 2009 9:02 pm    Post subject: Reply with quote



Sadly not a 5D lens as its rear male screw part is way too long Sad




PostPosted: Tue Jan 27, 2009 6:02 am    Post subject: Reply with quote

Do you mean the screw mount on this lens hits the 5D mirror ?

Lovely lens btw.


PostPosted: Tue Jan 27, 2009 9:04 am    Post subject: Reply with quote

luisalegria wrote:
Do you mean the screw mount on this lens hits the 5D mirror ?

Lovely lens btw.

Yes definetly it's but I guess it is a better choice for a collector and I want to use my glasses Smile
Screw mount is way too long than all other M42 lenses that I've owned and seen. You can see that from the first photo as there are still some part of the screw mount goes deeper by passing the adapter like 1mm. But to be honest I coudln't fiure out how I could manage to get these shots Rolling Eyes Then suddenly mirror has begun to go up buck can't come back again, loosening the lens released the mirror.


PostPosted: Thu Jan 29, 2009 3:00 pm    Post subject: Reply with quote

I'm selling it guys to a collector or not a 5D owner Smile
http://forum.mflenses.com/viewtopic,p,120299.html


PostPosted: Sun May 03, 2009 10:49 am    Post subject: Re: Carl Zeiss Jena Flektogon 2.8/35 (silver, m42, late 50s) Reply with quote

yalcinaydin wrote:
...Wide open it produces a fogy image, inner elements has something on them I don't know what are they exactly but can be haze, when stopped down it produces nice result...



I haven't used it since the original post as wide open results suck. Can you help me to define what is the problem. I couldn't take a photo that shows this yellowish stuff in the inner elements but you can see it in the video that I took:
http://www.dailymotion.com/video/x966eo_mistyflek35_webcam

As we can clarify the problem, I will move to the second step Rolling Eyes


PostPosted: Mon May 04, 2009 7:50 pm    Post subject: Reply with quote

I have one of these alu Flek 35s too with the same internal haze problem. In my copy's case, the haze *looks* like it's either on or within (balsam fault) the doublet in the schema below. Either that or it's on one of the other elements.

http://www.praktica-users.com/lens/mlenses/czjflek2.8_35.html

Unfortunately, my home-made tools won't budge the rear retaining rings due to them being super tight so I haven't managed to get inside as yet to confirm the problem. Sad

Time for an even bigger hammer... Laughing


PostPosted: Mon May 04, 2009 9:19 pm    Post subject: Reply with quote

bob955i wrote:
I have one of these alu Flek 35s too with the same internal haze problem. In my copy's case, the haze *looks* like it's either on or within (balsam fault) the doublet in the schema below. Either that or it's on one of the other elements.

http://www.praktica-users.com/lens/mlenses/czjflek2.8_35.html

Unfortunately, my home-made tools won't budge the rear retaining rings due to them being super tight so I haven't managed to get inside as yet to confirm the problem. Sad

Time for an even bigger hammer... Laughing

Thanks Bob, so the problem is haze, dissapointing though Sad


PostPosted: Mon May 04, 2009 9:30 pm    Post subject: Reply with quote

Hello Yalcin,

The Flektogon 35/2.8 is not hard to service (my sample was badly affected by the yellowish internal haze, as you can see on my blog). If you want to clean it, browse to my blog at http://k10dpentax.blogspot.com and then click on the Repair link in the Categories menu on the right ...

Hope this helps

Cheers

P.S.: too pity that this lens is not 5D-friendly, it has a really nice "3D" rendering ...


PostPosted: Mon May 04, 2009 9:50 pm    Post subject: Reply with quote

Yalın, when will we dismantle it? Laughing


PostPosted: Tue May 05, 2009 8:11 am    Post subject: Reply with quote

indianadinos wrote:
Hello Yalcin,

The Flektogon 35/2.8 is not hard to service (my sample was badly affected by the yellowish internal haze, as you can see on my blog). If you want to clean it, browse to my blog at http://k10dpentax.blogspot.com and then click on the Repair link in the Categories menu on the right ...

Hope this helps

Cheers

P.S.: too pity that this lens is not 5D-friendly, it has a really nice "3D" rendering ...

Thanks, great link.
My first attempt will be returning back the lens, if not then I'll clean it myself.


PostPosted: Thu May 07, 2009 9:44 pm    Post subject: Reply with quote

Got mine all cleaned Yalcin. Cool

The cloudiness was on the elements either side of the cemented doublet which itself is in perfect condition.

Took me all of five minutes to sort out once I had ground my home-made tooling to suit. Laughing

Lens now mounted on a nice old Pentacon FM. Cool

Give it a go yourself. Cool