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Archive 2017 · Zeiss Contax AEJ vs MMJ what's the difference?

  
 
Robert E
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p.1 #1 · Zeiss Contax AEJ vs MMJ what's the difference?


Looking at some Zeiss C/Y lenses and have come across these two definitions.
Can anyone tell me what the difference means? Origin of country made in? Lens coating?
Any help appreciated, thanks!



Apr 24, 2017 at 08:43 AM
AdaptedLenses
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p.1 #2 · Zeiss Contax AEJ vs MMJ what's the difference?


Had to do with multi mode metering on Contax bodies. Today, unless you're shooting film on one of those bodies, the only implication is ninja star bokeh, which only shows with points of light.


Apr 24, 2017 at 08:52 AM
jcolwell
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p.1 #3 · Zeiss Contax AEJ vs MMJ what's the difference?


AE is AutoExposure (older Contax camera control)
MM is multi-mode (newer Contax SLR control)

G is made in Germany
J is made in Japan

Coating developments are more or less continuous, and so it's likely that coatings changed (slightly) both between AE and MM variants, and within variants, for lenses with long production runs.

One of the most consistent difference between AE and MM lenses is the geometry of the diaphragm blades, and the shape of the aperture. Most (if not all) AE lenses have "ninja star" aperture shapes within about two-stops of wide open. This 'shape' is also seen in bright specular highlights. For example, the 50/1.4 shows ninja star for f-stops between about f/2 and f/2.8, while the MM version does not (see photo, below).

Here's a couple more examples,

AE ninja star [100/3.5 & 135/2.8) https://www.fredmiranda.com/forum/topic/982966/110#11366969

Here's some reading that might be of interest.

Tom Shea on Zeiss / Contax SLR Lenses http://photo.net/equipment/contax/shea-lenses

Contax/Yashica Lenses - Which are the best? [AE vs MM]
- [60mm macro versions] https://www.fredmiranda.com/forum/topic/1368225/1#13041750
- [28/2.8 AE vs. MM] https://www.fredmiranda.com/forum/topic/1368225/1#13040193
- [ask Zeiss] https://www.fredmiranda.com/forum/topic/1368225/1#13040809

Contax Lens Line-up questions [AE vs MM] https://www.fredmiranda.com/forum/topic/1327297/0#12663223

[four versions of 60/2.8 macro] https://www.fredmiranda.com/forum/topic/1461311/0#13809925

Contax 28mm/2.8 AE vs MM for EOS https://www.fredmiranda.com/forum/topic/581500/0
- Phillip Reeve, https://www.fredmiranda.com/forum/topic/1404438
Hi : ) !!! - Contax 35-70 mm vs. 60 mm makro !!! [60mm variants]
- [vital stats] https://www.fredmiranda.com/forum/topic/1437175/0#13616755
- [Zeiss brochure, first version photos] https://www.fredmiranda.com/forum/topic/1437175/0#13617965
- [lens names] https://www.fredmiranda.com/forum/topic/1437175/0#13618007
Contax 200mm and other atls https://www.fredmiranda.com/forum/topic/1394027/0#13256761
Contax or Leica R on a 6d https://www.fredmiranda.com/forum/topic/1297114/0#12374265
Zeiss Lens Brochure (Contax) 1975 about their lenses (MTFs),
- http://forum.mflenses.com/zeiss-lens-brochure-contax-1975-about-their-lenses-mtfs-t33679.html
- (posted by kds315* Klaus - Moderator) link: http://www.camerac.nl/scans/zeiss/zeissoptics1975.pdf
The Contax Zeiss Survival Guide, http://www.reduser.net/forum/showthread.php?92044-Contax-Zeiss-Survival-Guide&s=6cb1e436b999729bda707cfad2cfaeba
cdegroot (Cees De Groot) http://cdegroot.com/photo-contax/
Ninja star 135/2 (yes) http://forum.mflenses.com/ninja-stars-zeiss-planar-2-135-t42786.html

Sonnar 100/3.5 serial numbers https://www.fredmiranda.com/forum/topic/1368225/1#13042609

Zeiss Download Centre > Historical Data Sheets http://lenses.zeiss.com/photo/en_DE/service/download_center.html
The Zeiss Historica Society: http://www.zeisshistorica.org/
Contax CY System Hoods http://www.mir.com.my/rb/photography/hardwares/classics/contax/shared/accessory/hoods.htm

Contax cameras

MIR Photography in Malaysia http://www.mir.com.my/rb/photography/hardwares/classics/contax/index.htm
contax lens hoods http://www.mir.com.my/rb/photography/hardwares/classics/contax/shared/accessory/hoods.htm
Digital Image Studio http://home.swiftdsl.com.au/~distudio/contax_rts_ii/
Camera-info Contax manuals http://www.contaxinfo.com/seiten/manuals.htm
film bodies for C/Y https://www.fredmiranda.com/forum/topic/727420
Contax 139Q info https://www.fredmiranda.com/forum/topic/442761#3800684
how to hold the Contax 139Q https://www.fredmiranda.com/forum/topic/447815#3841444



© jcolwell 2017


Contax Zeiss Planar 50/1.4 C/Y: left, AEJ with Ninja star; right, MM




Apr 24, 2017 at 09:03 AM
mcbroomf
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p.1 #4 · Zeiss Contax AEJ vs MMJ what's the difference?


You are awesome Jim ...


Apr 24, 2017 at 09:45 AM
Robert E
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p.1 #5 · Zeiss Contax AEJ vs MMJ what's the difference?


Jim, thank you so much for that excellent comprehensive explanation. Guys like you make it such a pleasure to be a member of this board. Greatly appreciate your input. 😊


Apr 24, 2017 at 10:13 AM
Humble_Glory
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p.1 #6 · Zeiss Contax AEJ vs MMJ what's the difference?


Hi Jim,

Do you have any information on the differences betweeen Contax Distagon 28mm f/2 AE and MM?



Apr 24, 2017 at 05:49 PM
lbloom
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p.1 #7 · Zeiss Contax AEJ vs MMJ what's the difference?


Thanks @jcolwell for your efforts.


Apr 24, 2017 at 06:45 PM
jcolwell
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p.1 #8 · Zeiss Contax AEJ vs MMJ what's the difference?


Humble_Glory wrote:
Hi Jim,

Do you have any information on the differences betweeen Contax Distagon 28mm f/2 AE and MM?


Hi Humble,

Not specifically. I own the SMC Pentax 28/2, which has the same optical formula as the Contax Distagon 28/2 "Hollywood". The design for this lens was reputed to be a joint Zeiss/Pentax project. It's an excellent lens. I call mine, "Vancouver", which is Hollywood North.



Apr 24, 2017 at 07:21 PM
genji
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p.1 #9 · Zeiss Contax AEJ vs MMJ what's the difference?


jcolwell wrote:
Not specifically. I own the SMC Pentax 28/2, which has the same optical formula as the Contax Distagon 28/2 "Hollywood". The design for this lens was reputed to be a joint Zeiss/Pentax project. It's an excellent lens. I call mine, "Vancouver", which is Hollywood North.


Thanks for this fascinating piece of information. I had no idea that the design of the Distagon C/Y 28/2 and the SMC Pentax K 28/2 was the result of a Zeiss/Pentax collaboration. After reading a bunch of user reviews (all uniformly positive) of the Pentax lens, I started looking at samples and all I can say is Wow!. Does the Zeiss Hollywood have exactly the same smooth bokeh?



Apr 24, 2017 at 08:47 PM
jcolwell
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p.1 #10 · Zeiss Contax AEJ vs MMJ what's the difference?


genji wrote:
Does the Zeiss Hollywood have exactly the same smooth bokeh?


I can't say from experience, but I'd be surprised if they're not the same.



Apr 25, 2017 at 07:19 AM
timballic
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p.1 #11 · Zeiss Contax AEJ vs MMJ what's the difference?


I'm not sure if this is still true, but ~5 years back, it used to be always stated here, that Zeiss still service MM lenses, but not AE.


Apr 25, 2017 at 07:20 AM
Humble_Glory
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p.1 #12 · Zeiss Contax AEJ vs MMJ what's the difference?


"Vancouver" seems harder to find than "Hollywood". Haven't seen one for sale in the local B&S for years!

jcolwell wrote:
Hi Humble,

Not specifically. I own the SMC Pentax 28/2, which has the same optical formula as the Contax Distagon 28/2 "Hollywood". The design for this lens was reputed to be a joint Zeiss/Pentax project. It's an excellent lens. I call mine, "Vancouver", which is Hollywood North.




Apr 25, 2017 at 05:50 PM
genji
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p.1 #13 · Zeiss Contax AEJ vs MMJ what's the difference?


Humble_Glory wrote:
"Vancouver" seems harder to find than "Hollywood". Haven't seen one for sale in the local B&S for years!


The "Vancouver" certainly does seem rare though one sold on feeBay at the beginning of this month (from a seller in Singapore!) for USD899.99.



Apr 25, 2017 at 06:22 PM
jcolwell
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p.1 #14 · Zeiss Contax AEJ vs MMJ what's the difference?


Humble_Glory wrote:
"Vancouver" seems harder to find than "Hollywood". Haven't seen one for sale in the local B&S for years!

genji wrote:
The "Vancouver" certainly does seem rare though ...one sold on feeBay at the beginning of this month (from a seller in Singapore!) for USD899.99.


Thanks. Added to Lens$db. Sold on 31 March (I missed it).



Apr 25, 2017 at 08:50 PM
Humble_Glory
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p.1 #15 · Zeiss Contax AEJ vs MMJ what's the difference?




genji wrote:
The "Vancouver" certainly does seem rare though one sold on feeBay at the beginning of this month (from a seller in Singapore!) for USD899.99.


More than what i paid for my "Hollywood". recently got Nikkor 28 1.4, another excellent lens to shoot at 1.4, way cheaper than 28 Lux.



Apr 25, 2017 at 11:11 PM
genji
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p.1 #16 · Zeiss Contax AEJ vs MMJ what's the difference?


jcolwell wrote:
Thanks. Added to Lens$db. Sold on 31 March (I missed it).


Another sold in late January for EUR599. This might sound like heresy but I think I'd purchase the Vancouver in preference to the Hollywood. Though I'm hoping that Zeiss releases a 28mm Loxia that has some of the Hollywood's DNA.



Apr 25, 2017 at 11:20 PM
genji
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p.1 #17 · Zeiss Contax AEJ vs MMJ what's the difference?


Humble_Glory wrote:
More than what i paid for my "Hollywood". recently got Nikkor 28 1.4, another excellent lens to shoot at 1.4, way cheaper than 28 Lux.


The Nikkor 28/1.4 is a wonderful lens, the only modern Nikon lens that I truly liked. Once I got the Alt religion, the Nikon flange distance was too limiting so I sold the 28/1.4 (making a 50% profit) as well as all my other Nikon gear. But the lenses that Nikon made through the fifties in LTM mount are special, particularly for someone who frequently works, as I do, at close distances. I have the 50/2 (multiple copies), 50/1.4, and 105/2.5 and, to quote Dante Stella, "they offer great performance, even compared to modern lenses".



Apr 25, 2017 at 11:36 PM
Lee Saxon
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p.1 #18 · Zeiss Contax AEJ vs MMJ what's the difference?


genji wrote:
(making a 50% profit)


I hope you weren't *too* hard on your poor buyer. There are people who have these listed higher than new Otus 28's!!



Apr 26, 2017 at 12:09 AM
genji
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p.1 #19 · Zeiss Contax AEJ vs MMJ what's the difference?


Lee Saxon wrote:
I hope you weren't *too* hard on your poor buyer. There are people who have these listed higher than new Otus 28's!!


Honestly!? I should have held onto mine a while longer. Perhaps I could have made a 100% profit.



Apr 26, 2017 at 12:37 AM
Lee Saxon
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p.1 #20 · Zeiss Contax AEJ vs MMJ what's the difference?


genji wrote:
Honestly!? I should have held onto mine a while longer. Perhaps I could have made a 100% profit.


You don't have a 58 Noct-Nikkor, do you? If so you can make up the lost profits selling that one.




Apr 26, 2017 at 03:17 AM
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