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Please help identify Carl Zeiss Jena f2.8 Macro
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PostPosted: Wed Oct 31, 2012 10:42 pm    Post subject: Please help identify Carl Zeiss Jena f2.8 Macro Reply with quote
Please help me identify this lens. As you might be able to see from the picture that it is missing the plastic ring that normally contains the name of the lens. (does this affect the photographic qualities of the lens or is it purely cosmetic??)





Also any info on the value of it would be much appreciated.

Thanks Smile

Below is the mount which looks like a screw thread




PostPosted: Wed Oct 31, 2012 10:46 pm    Post subject: Re: Please help identify Carl Zeiss Jena f2.8 Macro Reply with quote
heard86 wrote:
Please help me identify this lens. As you might be able to see from the picture that it is missing the plastic ring that normally contains the name of the lens. (does this affect the photographic qualities of the lens or is it purely cosmetic??)





Also any info on the value of it would be much appreciated.

Thanks Smile

Below is the mount which looks like a screw thread


Very Happy


PostPosted: Wed Oct 31, 2012 10:58 pm    Post subject: Reply with quote
http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html

I think it's that one

edit :

If it's really the m42 version and it's mint....

http://www.ebay.com/itm/Carl-Zeiss-Jena-28mm-1-2-8-MC-lens-for-Pentax-M42-fit-with-caps-and-case-/160903360206?pt=UK_Lenses_Filters_Lenses&hash=item2576966ece&nma=true&si=XAPZfZWe5vsukRGiBEjd198Nc%2FQ%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

http://www.ebay.com/itm/Carl-Zeiss-Jena-28mm-1-2-8-MC-lens-for-Pentax-M42-fit-with-caps-and-case-/390458942884?pt=UK_Lenses_Filters_Lenses&hash=item5ae92aa5a4&nma=true&si=XAPZfZWe5vsukRGiBEjd198Nc%2FQ%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557


Kind of a crazy price for a Japanese 28mm lens if you ask me :S


PostPosted: Wed Oct 31, 2012 11:25 pm    Post subject: Reply with quote
Thanks for such a quick reply. Does anyone know if the fact that it is missing the plastic ring that contains the lens info,if this has an effect on the lens or if it is just cosmetic?

Thanks


PostPosted: Wed Oct 31, 2012 11:34 pm    Post subject: Reply with quote
heard86 wrote:
Thanks for such a quick reply. Does anyone know if the fact that it is missing the plastic ring that contains the lens info,if this has an effect on the lens or if it is just cosmetic?

Thanks


Cosmetic only.


PostPosted: Wed Oct 31, 2012 11:40 pm    Post subject: Reply with quote
Made by Cosina I think.


PostPosted: Wed Oct 31, 2012 11:45 pm    Post subject: Reply with quote
It has no value , bring only name of Carl Zeiss Jena nothing else, go for 20% higher than other noname Japanese lens in same focal length in normal case. Who made it really no matter , several low quality not respected brand like Sigma sold as Jena lens.


PostPosted: Wed Oct 31, 2012 11:53 pm    Post subject: Reply with quote
looking at the "m" and "ft" values, it seems like this is a different lens...


PostPosted: Wed Oct 31, 2012 11:53 pm    Post subject: Reply with quote
They were made by Sigma and Cosina, not sure if any others also made them. You are right, they are pretty low quality, they represent the cheapest Japanese production of the late 80s/early 90s.

I think this one is this Cosina rebadged:



If it's like other Cosinas of the same age I've tried it will be so-so in sharpness, muted colours and so-so contrast.


PostPosted: Thu Nov 01, 2012 12:14 am    Post subject: Reply with quote
Thanks so much for the replies...

I intend on selling it so If somebody could help me find the exact specs of the lens it would be a great help....

It seems a lot more like this one than the other ones you have posted about:

http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html

It has a "P" symbol on the rear lens cap.

Can you work out the exact spec from the numbers on the side?

Thanks


PostPosted: Thu Nov 01, 2012 12:22 am    Post subject: Reply with quote
heard86 wrote:
Thanks so much for the replies...

I intend on selling it so If somebody could help me find the exact specs of the lens it would be a great help....

It seems a lot more like this one than the other ones you have posted about:

http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html

It has a "P" symbol on the rear lens cap.

Can you work out the exact spec from the numbers on the side?

Thanks


P means on rare cap, not factory made product , made buy a small third party maker probably in China and mark cap P = Pentax screw mount


PostPosted: Thu Nov 01, 2012 12:23 am    Post subject: Reply with quote
Andreq wrote:
http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html

I think it's that one

edit :

If it's really the m42 version and it's mint....

http://www.ebay.com/itm/Carl-Zeiss-Jena-28mm-1-2-8-MC-lens-for-Pentax-M42-fit-with-caps-and-case-/160903360206?pt=UK_Lenses_Filters_Lenses&hash=item2576966ece&nma=true&si=XAPZfZWe5vsukRGiBEjd198Nc%2FQ%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557



WTF sold for £175....... Shocked


PostPosted: Thu Nov 01, 2012 12:31 am    Post subject: Reply with quote
No bid history, sold on fixed price , probably for clue less beginner or to seller friend and they both agree to cancel transaction. In this case Ebay refund fee. Sold item will be a good reference as market price and next time real buyer will happily take for half price 80 UKP a 20 ukp value lens. Obvious trick and works.


PostPosted: Thu Nov 01, 2012 2:47 am    Post subject: Reply with quote
There's no Cosina 2.8/50s on ebay UK, but the common Cosina 2/50 in Pentax K mount is a 5-10ukp item.

Here's a similar 'Carl Zeiss' lens with caps and original leather case with 3 days left, this might give some idea of value by it's final sale price:

http://www.ebay.co.uk/itm/carl-zeiss-jena-lens-/321012180862?pt=UK_Lenses_Filters_Lenses&hash=item4abdd1277e


PostPosted: Thu Nov 01, 2012 10:51 pm    Post subject: Reply with quote
iangreenhalgh1 wrote:
There's no Cosina 2.8/50s on ebay UK, but the common Cosina 2/50 in Pentax K mount is a 5-10ukp item.

Here's a similar 'Carl Zeiss' lens with caps and original leather case with 3 days left, this might give some idea of value by it's final sale price:

http://www.ebay.co.uk/itm/carl-zeiss-jena-lens-/321012180862?pt=UK_Lenses_Filters_Lenses&hash=item4abdd1277e


Huh, this one seems tricky. Might be original Zeiss Jena leather case combined with Cosina plastic lens.


PostPosted: Thu Nov 01, 2012 11:27 pm    Post subject: Reply with quote
No, the Japanese 'Carl Zeiss' lenses by Cosina always came with those brown leather cases, that was the best thing about them.


PostPosted: Fri Nov 02, 2012 2:54 am    Post subject: Reply with quote
looks like the 24/2.8 version, not the 28/2.8


iangreenhalgh1 wrote:
They were made by Sigma and Cosina, not sure if any others also made them. You are right, they are pretty low quality, they represent the cheapest Japanese production of the late 80s/early 90s.

I think this one is this Cosina rebadged:
If it's like other Cosinas of the same age I've tried it will be so-so in sharpness, muted colours and so-so contrast.


I did a quick comparison shot with the E mount 24/1.8 and my 28/2.8 and other than FOV and DOF, I didn't see a difference.
E 24/1.8 @ 1.8 ISO 500(Auto ISO)


CZJ 28/2.8 @ 2.8 ISO 1000(Auto ISO)



I did have a similar Cosina 28/2.8 which I never had a chance to use side by side, the Cosina is now seized,
they do have different coatings, and the Cosina had noticeable distortion on my 1DIII, I see none on the NEX-7 with the CZJ.


PostPosted: Fri Nov 02, 2012 7:37 am    Post subject: Reply with quote
The discussed 2.8/24mm Cosina gives quite decent results. Mine was branded Exaktar. I doubt Cosina marketing would be so stupid and not use Zeiss brand name on their good product. Here some old shots: http://forum.mflenses.com/cosina-macro-2-8-24mm-on-pentax-k10d-a-bit-of-neo-noir-t54193.html
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