Home

Please support mflenses.com if you need any graphic related work order it from us, click on above banner to order!
SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

Contax Distagon 2.8/28 vs Jena 2.8/28
Post new topic   Reply to topic
Home   Manual Focus Lenses
View previous topic :: View next topic  


PostPosted: Sun Feb 05, 2012 8:36 pm    Post subject: Reply with quote
As far as I know (as a Praktica B user from before the Berlin Wall came down) the PB-mount Carl Zeiss Jena P 28mm f2.8 is a reworked version of the M42 Meyer Orestegon/Pentacon 29mm f2.8, a lens which some people like and others say is rubbish!

The most common PB version I've seen in the UK is the plastic barrelled (Mk2) version, the Mk1, which I've never seen has a metal barrrel.

The one at http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html is not one I've seen before, but does look like the other CZJ-badged Sigmas I've seen in other mounts, e.g. OM-mount. Although it is marked 'II' it is NOT the Mk2 version of the real CZJ lens!

I actually have another version CZJ/Pentacon 28mm f2.8 in PB which is definitely a later Sigma, and yet another design.

As far as I'm aware there were never any Cosina lenses rebranded as CZJ in the UK, because the UK distributor of Praktica was CZ Scientific (now called Jenoptik UK) who also were the UK distributor for Sigma!

If you want to compare the lens construction etc the real CZJ/Meyer plastic barrelled (Mk2) lens is shown here:
http://www.praktica-users.com/lens/blenses/pp2.8_28.html
and the Orestegon here:
http://www.praktica-users.com/lens/mlenses/morp2.8_29.html

I also Googled the C/Y CZ Distagon T and found this:
http://bit.ly/yIZFdY (Sorry the normal URL seems to mess up the BBCode and stops the reply from posting!)

Remarkably the construction (7 element in 7 groups), angle of view (75 degrees), and closest focus (0.25m) are identical for both the CZJ PB 28mm and the Distagon, they appear to be exactly the same design! But the CZJ lens is smaller and about 40g lighter...


PostPosted: Sun Feb 05, 2012 8:59 pm    Post subject: Reply with quote
imperian wrote:
Thanks for the good info in this. Just to confirm with you, is the Contax Distagon 2.8/28 hitting mirror or losing infinity when mounted on 5D with adaptor?

Zero problems with the D28/2.8 on my 5D at infinity focus.


PostPosted: Sun Feb 05, 2012 8:59 pm    Post subject: Reply with quote
I've had 28/2.8 Distagons in both AE and MM style and both were fine on my 5D Smile


PostPosted: Sun Feb 05, 2012 9:54 pm    Post subject: Reply with quote
Lord Minty wrote:
The one at http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html is not one I've seen before, but does look like the other CZJ-badged Sigmas I've seen in other mounts, e.g. OM-mount. Although it is marked 'II' it is NOT the Mk2 version of the real CZJ lens!

I actually have another version CZJ/Pentacon 28mm f2.8 in PB which is definitely a later Sigma, and yet another design.

As far as I'm aware there were never any Cosina lenses rebranded as CZJ in the UK, because the UK distributor of Praktica was CZ Scientific (now called Jenoptik UK) who also were the UK distributor for Sigma!


I think you're wrong here. Google image search "sigma mini-wide 2.8/28mm" and you'll see how different Sigma looks like. 24mm Sigma is presented here (it looks nearly identical to 28mm): http://forum.mflenses.com/pentacon-prakticar-2-8-24-mc-t18672.html

Cosina Prakticar has all identification marks from COSINA lenses. It's 24mm brother: http://forum.mflenses.com/viewtopic.php?t=37204

ManualFocus-G wrote:
I've had 28/2.8 Distagons in both AE and MM style and both were fine on my 5D Smile


Did you ever compare them with Prakticar 28mm? I mean real one of course: http://www.praktica-users.com/lens/blenses/pp2.8_28.html


PostPosted: Sun Feb 05, 2012 10:23 pm    Post subject: Reply with quote
Here is a metal barel Prakticar 28/2.8. (the left one, the rest are newer versions)



PostPosted: Sun Feb 05, 2012 10:50 pm    Post subject: Reply with quote
Lord Minty wrote:


....

Remarkably the construction (7 element in 7 groups), angle of view (75 degrees), and closest focus (0.25m) are identical for both the CZJ PB 28mm and the Distagon, they appear to be exactly the same design! But the CZJ lens is smaller and about 40g lighter...


Sorry, they have different optical design. Prakticar 28/2.8 might have been derived from Pentacon's Orestegor 29/2.8 design.
See this figure (left Orestegor 29/2.8, right Prakticar 28/2.8 )



I disassembled one of Prakticar 28/2.8's I own, so I found some new design. Though it not deadly accurate, but the entire design
looks like the right one.

Btw, the optical design of Contax Distagon 28/2.8:


PostPosted: Tue Feb 07, 2012 8:54 pm    Post subject: Reply with quote
Pancolart wrote:
Lord Minty wrote:
The one at http://www.mflenses.com/carl-zeiss-jena-ii-28mm-f28-macro-japanse-version.html is not one I've seen before, but does look like the other CZJ-badged Sigmas I've seen in other mounts, e.g. OM-mount. Although it is marked 'II' it is NOT the Mk2 version of the real CZJ lens!

I actually have another version CZJ/Pentacon 28mm f2.8 in PB which is definitely a later Sigma, and yet another design.

As far as I'm aware there were never any Cosina lenses rebranded as CZJ in the UK, because the UK distributor of Praktica was CZ Scientific (now called Jenoptik UK) who also were the UK distributor for Sigma!


I think you're wrong here. Google image search "sigma mini-wide 2.8/28mm" and you'll see how different Sigma looks like. 24mm Sigma is presented here (it looks nearly identical to 28mm): http://forum.mflenses.com/pentacon-prakticar-2-8-24-mc-t18672.html

Cosina Prakticar has all identification marks from COSINA lenses. It's 24mm brother: http://forum.mflenses.com/viewtopic.php?t=37204


The CZJ/Pentacon 28mm f2.8 in PB I have is definitely a Sigma and is exactly like the Sigma in that link - I could post a photo of it.

I agree that the other 28mm looks like a Cosina (I have the 20mm f3.8 in M42), but I have never seen any non-Sigma version in Praktica Bayonet (PB-mount) branded as CZJ, Pentacon or Prakticar in the UK.


PostPosted: Sat Mar 03, 2012 4:43 pm    Post subject: Reply with quote
Zeiss Jena Prakticar 2.8/28mm & CANON 5DmkII. Made with (first) metal barrel model as shown above by Koji.

Click (2x?) on photo for 1800x1200 pixels.















PostPosted: Sat Mar 03, 2012 5:39 pm    Post subject: Reply with quote
In my own, personal experience, the Distagon 2.8/28 and the Pentacon 2.8/29 play in different leagues completely.
It is one of those cases where the difference in price really has a meaning.


PostPosted: Sat Mar 03, 2012 6:10 pm    Post subject: Reply with quote
Nice samples Pancolart. Slovenia looks quite like northern Italy to my eyes.

I have never tried the Distagon but I have the Pentacon 2.8/28 and had the Orestegon 2.8/29.

My opinion is that the 29, if a good copy, is a very good lens. However, the 28 is better, I think the 28 is a top lens.


PostPosted: Sat Mar 03, 2012 6:16 pm    Post subject: Reply with quote
Pancolart, how did you manage to mount the PB version of the CZJ 28/2.8 on your 5D II? I'd love to do some comparisons with the Distagon, but none of my PB lenses reach infinity with the Canon adapter. I guess I could try it on the Nex (if I bought a PB infinity adapter), but I much prefer to see a lens performing as it should on full frame Smile


PostPosted: Sat Mar 03, 2012 7:47 pm    Post subject: Reply with quote
iangreenhalgh1 wrote:
Nice samples Pancolart. Slovenia looks quite like northern Italy to my eyes.

I have never tried the Distagon but I have the Pentacon 2.8/28 and had the Orestegon 2.8/29.

My opinion is that the 29, if a good copy, is a very good lens. However, the 28 is better, I think the 28 is a top lens.


Thanks. It borders Northern Italy, though Celje (on photos) is more central. I never tried Distagon either. We can wait Graham to compare.

I agree 28mm is better then 29mm. Edge to edge sharpness for sure. Practically no CA.

ManualFocus-G wrote:
Pancolart, how did you manage to mount the PB version of the CZJ 28/2.8 on your 5D II? I'd love to do some comparisons with the Distagon, but none of my PB lenses reach infinity with the Canon adapter. I guess I could try it on the Nex (if I bought a PB infinity adapter), but I much prefer to see a lens performing as it should on full frame Smile


To reach infinity just unscrew 3 tiny screws on focusing ring (distance scale) to release it. On this metal version they are outside of the barrel and immediately reachable. Then adjust infinity and screw them back. On mkII Liveview is required. But mirror hits only by thin hair, thus trimming a bit of the last element holder would suffice. Let me know if you don't have such metal version.


PostPosted: Sat Mar 03, 2012 9:14 pm    Post subject: Reply with quote
Or you can shave your adapter like the right one in this photo.



PostPosted: Sat Mar 03, 2012 9:47 pm    Post subject: Reply with quote
There is nothng better than the Carl Zeiss 28mm f2.8 Distagon T* as far as 28mm primes go but its not as cheap as it used to be...If you can afford the Distagon, a very cheap sustitute worth considering is the Carl Zeiss Jena 29mm f2.8 MC...A bone fide East German Zeiss Jena. And while it cant match the the Japanese Carl Zeiss 28mm f2.8 Distagon T* for sharpness, its actually pretty good for a cheap M42 lens.

Here is a 100% crop from the CZJ 29mm @ f2.8 (The sharper the lens the greater the Moire):



And here is one from the Distagon @ f2.8:



And just to show how good they are here is one from a Sirius 28mm f2.8 Macro @ f2.8:



Last edited by DSG on Sun Mar 04, 2012 12:28 am; edited 1 time in total


PostPosted: Sat Mar 03, 2012 9:56 pm    Post subject: Reply with quote
Many thanks for the tips, I'll check the Prakticar tomorrow.

DSG - isn't the CZJ 29/2.8 just a rebranded Pentacon? My 7th copy of the Pentacon is excellent.


PostPosted: Sat Mar 03, 2012 10:16 pm    Post subject: Reply with quote
ManualFocus-G wrote:
Many thanks for the tips, I'll check the Prakticar tomorrow.

DSG - isn't the CZJ 29/2.8 just a rebranded Pentacon? My 7th copy of the Pentacon is excellent.


Graham, if you want a Praktica 2.8/28 to play with,I have a slightly abused one you can have for the postage, it works fine, just I took it apart to fix the aperture ages ago and had to remove all the electrical bits, it is fully working, just one sot of coating missing on the front, takes good pics.

I rate the Pentacon 2.8/28 a little it higher than the 2.8/29 Meyer Orestegor/Pentacon, although the Orestegor I had was pretty damn good.

The best 28 I have tried (and I must have shot 20 different ones now) is the Konica Hexanon 3.5/28 earlier EE version with 7 elements, it's really really good, sharp as a razor, great colours and contrast, some 3D pop, pleasant bokeh.

Other 28 I highly recommend is the Tokina RMC/Hoya HMC 2.8/28, it has the best bokeh of any 28 I've tried and has excellent coatings, pretty sharp too, colours are very vivid.


PostPosted: Sat Mar 03, 2012 11:17 pm    Post subject: Reply with quote
Hi Ian, many thanks for the kind offer. I'll attempt a non-destructive fix on my CZJ Prakticar first (same lens as yours) but give you a shout if I get stuck Smile

BTW I owned the Hoya 24/2.8 before, it was great for closeups but struggled in the corners at infinity on ff. Damn good value though!


PostPosted: Sat Mar 03, 2012 11:51 pm    Post subject: Reply with quote
ManualFocus-G wrote:
Hi Ian, many thanks for the kind offer. I'll attempt a non-destructive fix on my CZJ Prakticar first (same lens as yours) but give you a shout if I get stuck Smile

BTW I owned the Hoya 24/2.8 before, it was great for closeups but struggled in the corners at infinity on ff. Damn good value though!


Not tried mine on FF, only on NEX, where it does a good job, rarely use it though as I have a Hexanon 24mm as well.


PostPosted: Sun Mar 04, 2012 12:34 am    Post subject: Reply with quote
ManualFocus-G wrote:
Many thanks for the tips, I'll check the Prakticar tomorrow.

DSG - isn't the CZJ 29/2.8 just a rebranded Pentacon? My 7th copy of the Pentacon is excellent.


It is possible but I cant be sure without seeing an optical diagram...I just read a review for it and the reviewer was'nt sure either.


PostPosted: Sun Mar 04, 2012 1:24 am    Post subject: Reply with quote
Yes, I have seen the 2.8/29 with CZJ labelling, it's the same lens as the Pentacon/Meyer Orestegor, looks identical apart from the letters.


PostPosted: Sun Mar 04, 2012 2:53 am    Post subject: Reply with quote
iangreenhalgh1 wrote:
Yes, I have seen the 2.8/29 with CZJ labelling, it's the same lens as the Pentacon/Meyer Orestegor, looks identical apart from the letters.


Mine is not identical to any of these:



Mine is mint and looks like it was made very recently.


PostPosted: Sun Mar 04, 2012 9:46 am    Post subject: Reply with quote
Here's the late M42 Pentacon 29/2.8:





And here's the even later Carl Zeiss Jena P (Pentacon) labelled version:





I suspect the CZJ labelled version was built after the PB mount lenses had made an appearance, as the PB lenses which were labelled CZJ, but were actually Pentacons also had a P after the name on the ring.


PostPosted: Sun Mar 04, 2012 2:54 pm    Post subject: Reply with quote
ManualFocus-G wrote:
Here's the late M42 Pentacon 29/2.8:


And here's the even later Carl Zeiss Jena P (Pentacon) labelled version:






Thats the one!...I had'nt noticed the P on the front ring of mine before, then I went and checked mine again after seeing your pic...BTW, I just noticed another possible distinguishing feature...On the late Pentacon Multi pic, which indeed seems otherwise identcal to the late CZJ P version, the red dot next to the red index line on the Pentacon appears to be more of an oval shape whereas the one on the CZJ is a normal round dot. But perhaps this is due to the angle the dot was shot at on the Pentacon? If you have the Pentacon could you check this out for me?

Last edited by DSG on Sun Mar 04, 2012 7:43 pm; edited 1 time in total


PostPosted: Sun Mar 04, 2012 3:06 pm    Post subject: Reply with quote
Just checked and the dot is round, like the CZJ branded version. The font on the front is different though of course.


PostPosted: Wed Mar 07, 2012 7:14 pm    Post subject: Reply with quote
I'd like to compare the Distagon 28/2.8 and the zuiko 28/2. Any ideas?
Post new topic   Reply to topic
Home   Manual Focus Lenses
Goto page 1, 2  Next
Page 1 of 2