Photo Arsenal had a Tele-Apotessar 500/5.6, C/Y mount, on eBay a few months ago. From the pics, this prototype looked ready for production. Asking price was $15000, or so.
Clarifications to the post by Lotusm50:
- The TAT300 is AE.
- The SP100 is an AE lens. When used on a bellows unit, linkage is conveyed mechanically to the front standard by cable. When cable is absent, taking aperture is reached with the lens ring or by pressing a button on the front standard.
Lotusm50 wrote:
The difference between "AE" lenses and "MM" lenses is the types of automation they allow with the Contax bodies. AE lenses were the first Contax (C/Y) lenses and they provided for aperture-preferred automatic exposure. Later, MM lenses were produced that had an additional linkage to the camera body to allow shutter priority and program auto exposure modes. I don't know when the swtich was made and some lenses were never made in the MM mount. AE doesn't necessarily imply German manufacture. Since more of the lenses were initially made in Germany, an AE lens may have a great chance of being made in germany. Production of some lenses when converted to MM mount was switched to Japan, some lenses made the switch later, some never made the switch and some were always made in Japan. To confuse things a bit, lens design changes were sometimes thrown into the mix as well. Details as to dates and and model and their production histories is, unfortunately, not something I cared to make note of. Optically, of course, there is no difference between a Contax AE lens and an MM lens (and should be no difference between a Contax lens made in Germany and the same lens made in Japan -- despite fanatic claims to the contrary). ...Show more →
WRONG WRONG WRONG!
"Optically, of course, there is no difference between a Contax AE lens and an MM lens (and should be no difference between a Contax lens made in Germany and the same lens made in Japan -- despite fanatic claims to the contrary"
SOME MM-lenses-Zeiss confirmed- are better. 28, 135?Only havent yet found the location of information anymore. bokeh is definitively different since MM have roundshaped apertures.
Also Wrong about mirrorclearing of the AE-18mm.
DSRLexchange (Jorge Torralba) made or offered a very clever adapter, the best one i know since it has screw instead of nonworking blade to hold the lens, which has the size to clear the mirror on FF. but it will not reach infinity.
There must be deep old discussions here and in rangefinderforum about all the problem. btw: i received a special-maybe macro-adapter from china which has a springdriven hook/lever. its the right direction but spring is too weak to hold. i dont understand why the chinese are selling such a crap. and there are more crap-adapters C/Y-EOS around. i think i already informed in this forum.
AND never every buy a Optixpcb- C/Y-EOS-adapter with chip. chip alone could be good since easy programmable but there is a russian one with eTTL exclusively, and the general seller of bielarus on ebay(name not present at the moment)has all the skills to mount it correctly.but he is also selling stuff.
Why not buying this Optixpcb? because they are selling also crap. adapter is an OEM which they altered(or let it be made) to mount the chip. it must be centered. but adapter is so wobbly that chip loses contact! And they are most arrogant: 1. selling high precision called cheap OEM for higher price 2. asked to send it back to HK, but afterwards refusing to compensate for the costs 92 chf plus shipping. No reaction nothing. waiting since 2016. I will put fire under their A.....e soon.
Similar thing with Peleng8 bielarus.. In testphase i oftenremoved the lenses. and after some time the blade broke. He also told to send it back(48 chf paid plus shipping back). After 3 weeks in customs(i dont know do they sleep in bielarus?) he refuse to take the package. the only advice i can give: get the hint about adding a pin to the adapter but dont buy from him. the only adapter with the right Blade(thickness) comes from K+F concept, 0.7mm versus 0.22 and 0.4 for the crappy ones. and focus goes beyond infinity. good for lenses which are deadjusted. only mounting chip C/Y-EOS is delicate since provided socket for eTTL-dandelion is 0.3mm too short. there should be a workaround how to augement. but have no time now doing that. The General selling manager would certainly mount. will get his adress from leitax who is not only mounting optixpcb but also the eTTL-Dandelion. but with simplest programming. forget all the others EMF etc. too complicated.
could confirm the need for overhaul. had a 35/1.4 my first zeiss used a lot, needed overhaul in the 80ties.
Not sharp at infinity
although not investigated properly when testing adapters i had the feeling some AE-lenses(dont have MM) were sharper at 450m which is not infinity.
The K+F concetp adapter is most sophisticated design regarding fitting. there is an adapter-site.- peeble.... dont know exactly... which is explaining all the important facts about a good adapter. link must be in one of the discussions here in FM.
I wonder how most expensive from Novoflex is holding the lens.
I have a sigma 28/1.8 highspeed wide,plastic lens, so i neednt wonder that the lens is totally deadjusted. worst from all my lenses. optically on APS-C fantastic. infinity at 40m and notch on mount worn out. Will come back to the Zeiss-mount in a later reply since Zeiss changed their mount maybe more than once. black was the oldest less solid notch could wear-out.
jjlphoto wrote:
Bigreen- so what is your question? What specifically do you want to know? Lots of knowledgeable people here to help. The smallest aperture number on an AE is white, on an MM is green. The physical mount on an AE is black, and on an MM is silver. When using these lenses manually on EOS bodies, they both operate the same, the AE vs. MM mechanisms are not doing anything.
Not quite right.
Zeiss improved the mount already on the AE or replaced them when overhauled.
I have black-silver-mount(outer side silvery) on one of my AE-lenses 28/2.8 AEJ. maybe mounted from scratch. they are more solid against worn-out notch, yashica-manager told.
NB: On the leitax-lenslist the 50/1.4 JP is not there. it seems AEG -mount could fit. Will discuss with David these days. have also the 50/1.7 which needs special AEJ-mount.
jjlphoto wrote:
I just saw a pic of a CZ zoom on B/S. It is clearly an AE lens, but the ring is silver. Go figure. I just had a 28/2.0 AE in for service and Zeiss replaced the black ring with a silver one. So I guess the color of the ring is not the indicator.
black-silver only outer-side is silver. or did they change to silver only?. pls correct me. have a AEJ 28/2.8 made this way.
also in the archive:
CONTAX 25/3.5 Zeiss PC-ApoDistagon T* MM https://web.archive.org/web/20091022091101 /http://www.geocities.com/ilprode/TestZ.htm
18/2.8 there most probably the Cine-PC-lens shown on a long list and image of prototypes somewhere in my files-must be online.
25/1.4 most interesting also. we have now the Otus 28.1.4 wow!
on the mir-site the official motordrive is shown. There was an earlier prototype? looking like the Olympus OM one. Had it would have liked it after having switched from OM 1978, bad lenses were the reason and neverending om-2 shutterproblem(short times)
emmanuel amarg wrote:
and the legendary 25mm PC... only a proto. I really want one !
With tilt, please.
zoerk altered the pc-superangulon 28mm to a tilt only lens for contax 645. there must be images online.
lets wait what swiss nws will provide. lenses for all kind of formats and new tilt-shift-system.
rico wrote:
Photo Arsenal had a Tele-Apotessar 500/5.6, C/Y mount, on eBay a few months ago. From the pics, this prototype looked ready for production. Asking price was $15000, or so.
Clarifications to the post by Lotusm50:
- The TAT300 is AE.
- The SP100 is an AE lens. When used on a bellows unit, linkage is conveyed mechanically to the front standard by cable. When cable is absent, taking aperture is reached with the lens ring or by pressing a button on the front standard.
not " or" but AND pressing the aperture button. double-cable-release and electromechanical adapter would be advised. DIY-electrical adapter to the old 2.5 mm or whatever sized screw-adapter is easily made. But there is a special electrical cable(have the naming) which will trigger the cam when mechanical cable release has closed the aperture. never used it doesnt have that cableS37S. but an instruction. cable-release must be pressed until exposure has finished.
All about optical differences are here. http://forum.mflenses.com/viewtopic,p,1523384.html#1523384
25/2.8
28/2.8
135/2.8 all MM are improved optical design than AE, Zeiss confirmed.
remember: Late Dr. Hubert Nasse told earlier they were not allowed to produce the best possible quality for the consumer market.
