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Tamron 70210 MF issues

Thanks for the feedback everyone. I've since discovered that I do have the MM adapter (a bit disappointing that the dealer was so vague).

Also found information on this forum on how to adjust the MM tab on the adapter so that the camera will pick up the correct smallest aperture (32). I played around with this, but it seems that when the mininum aperture is picked up correctly, the maximum is a half stop out, and vice versa!

Also, this does not change the fact that adjustment through the aperture range isn't always picked up correctly by the camera, and while this doesn't affect exposure (the lens does stop down to the set aperture) it does affect the TTL meter reading. In my opinion, this detracts from the portability advantage of the lens, which sold me on it: Portability isn't quite so attractive when metering is fiddly.

So, I'll be selling this lens and getting something else. I have the Zeis 28, 50 and 85 (f2.8) primes, thinking of getting the 135. Any recommendations?

Thanks, Neels
 
Hi Neels, the 2.8/135 is a MUST in my eyes ! A real great performer, high quality ! Nothing better in my eyes (and I've compared it with Leica, Canon 2.8/135 - Pentax 2.5/135 is next best) in this range. The 2.0/135 should be better but who can afford it ? You already have the 2.8/85 so I do not recommend the 100mm-lenses which are too close to it. Your problem with the Tamron is only relevant with program- and TV-mode, not with AV-mode. I'm not using a Contax with P- or TV-mode so I don't have this problem. The Yashica 107, 108, 109 and FX103 (which have P-mode too) should not have the same same problem as the Contaxes. Best wishes Paul
 
Hi to all!

I had the same problems like Neels with the MM-adapter on my Tamron 2,8/300. I tried out 6 (!) different MM-adapters on three Contax cameras (RX, ST and Aria). Each adapter showed different values not only on one camera, but also each single adapter showed different values on all cameras. So I skipped to the AE-adapter, which shows the correct value.

What interests me is, if the aparture blades of the Tamron act like the the blades of the old Zeiss AE-lenses or like the new blades of the MM-lenses.

When I am using my Tele-Tessar 4/300 I choose the green aparture value and the 4000th sec on my Contax cameras and let the override function do the rest. I still would like to use my Tamron the same way.

Wolfram
 
Hi I have a tamron MM adapter on an old 300mm 5.6 SP and that shows correct values for aparture in the view finder display,were as the old AE adapter was always 1/2 stop off.
In case it helps its engraved 54B No905809. have not tested it in Tv mode yet so cannot provide information on MM function, but I will post when I have.
 
Hi just a thought are you following the instruction and seting the lens to max aparture befor fitting the adapter.
 
Reply to Wolfram Schnuebbe on Wednesday, July 09, 2003

MM and AE Tamron adapters on Contax.

aperture blades of the Tamron act like > the the blades of the old Zeiss AE-lenses or like the new blades of > the MM-lenses. The MM adapters will bring up all the programs of the Contax. However, the only way you'll know if the Tamron lens+MM adapter works as accurately as a Zeiss MM lens is to make a test with slide film, shoot Tv, varying the speed to see if the camera sets the correct f/stop. The slides should be all of the same density. Although, in my experience, the MM adapters did not cause the body to register the exact f/stop, I found this function did not affect the actual f/stop, meter, or exposure. Hope this helps, Tom C
 
I have a very old Tamron 200 f3.5 adaptall 2 lens with an AE mount. Nowadays I'm testing it with a RTS3 body, blocking the "MM lever" in order to use the Tv. First results are quite good. I've noticed the same problem than others with the wiewfinder aperture indicator.

In the lens manual is noticed the use in shooter priority in some 80's camera bodies. In fact, the f32 indicator is in diferent color and with an "AE" expression.
>First, the set aperture isn't always picked up correctly by the camera, apparently caused by loose tolerance on the adapter's lever. I think this is a known problem<

Somebody in a photo store has noticed me that this problem is very common in used adaptall 2 mounts. But only affects the metering in M or AE mode and, I think, only in a half stop.
 
>Your problem with the Tamron is only relevant with program- and TV-mode, not with AV-mode. I'm not using a Contax with P- or TV-mode so I don't have this problem. The Yashica 107, 108, 109 and FX103 (which have P-mode too) should not have the same same problem as the Contaxes.<

Somebody in a photo store has noticed me that this problem is very common in used adaptall 2 mounts. But only affects the metering in M or AE mode and, I think, only in a half stop. This Yashicas detect half stop apertures? I have a 139Q and a RTS3. I have only the problem with the RTS3, which detect half stops in M and AE mode. I never had this problem in 15 years with the 139Q.
 
> It was amazing. The first MM-adapter showed a aparture value of f 2 - a 2/300 lens! I guess the question if this effects the exposure depends on how the Contax cameras works. I hope I can put this into the right english terms - after a days work and while the neighbors dog is barking hystericly.

So: Does the camera read out the values by the levers (*before* the blades where shut) plus the light, or does the camera calculate the shutter speed by the exact light that comes inside *after* the blades where shut?

Well, I did a lot of testing with my Tamron 2/300 ;-) and MM-adapter plus RX/ST/Aria, Sensia 100/400, on TV and AV. The slides showed underexposed results on f 3,5 (less) and 2,8 (more). Which tells me that this combination does the same job a Tele-Tessar 4/300 can do! The other aparture values were obviously correct. I even tested, what happens, if I turned the the mount left and right (which did not effect the exposures). The MM adapter I used was the one, that show the f 22 and f 2,8 values correctly on the display of all three cameras - but the values in between showed different values.

Since it ist just that additional lever that makes the difference between the MM and AE lenses, why that? Like I said, the AE adapter shows the correct values on all cameras.

Disturbed Wolfram
 
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