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Can this lens be adapted for EOS-Canon? Mount I.D.?
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PostPosted: Sat Dec 17, 2011 8:29 pm    Post subject: Can this lens be adapted for EOS-Canon? Mount I.D.? Reply with quote
this is the lens, it was mounted on a Minolta DYNAX 300SI, but there are two mount systems from minolta, so I wonder if this mount has an adapter for EOS? because I really have no idea...







PostPosted: Sat Dec 17, 2011 8:39 pm    Post subject: Reply with quote
I belive it's Alpha mount .Works on Sony Alpha ,never heard of such an adapter on EOS .


PostPosted: Sat Dec 17, 2011 9:04 pm    Post subject: Reply with quote
Yes, it's Sony/Minolta Alpha mount, only useable on Sony DSLRs or Minolta Dynax/Maxxum 35mm SLRs as the aperture is controlled by the body electronically.

Sell it to a Sony DSLR user.

BTW, EOS register is 44.0mm and Sony/Minolta Alpha is 44.5mm so an adapter wouldn't be possible, have to be 0.5mm thick.


PostPosted: Sun Dec 18, 2011 1:51 am    Post subject: Reply with quote
Adapter is possible it will just focus slightly beyond infinity and also closest focus distance would rise.
but yeah if there are no adapters of this kind on ebay.. ill have to sell it


PostPosted: Sun Dec 18, 2011 1:58 am    Post subject: Reply with quote
Yes but you can't control the aperture so could only shoot it wide open.


PostPosted: Sun Dec 18, 2011 9:53 am    Post subject: Reply with quote
Quote:
Yes, it's Sony/Minolta Alpha mount, only useable on Sony DSLRs or Minolta Dynax/Maxxum 35mm SLRs as the aperture is controlled by the body electronically.


It's also useable on the NEX or Micro 4/3, there are adapters with a aperture control ring. I just got one for my STF, but couldn't resist to try some of my other Minolta lenses.

Works great and looks a bit "special" Laughing








PostPosted: Sun Dec 18, 2011 12:43 pm    Post subject: Reply with quote
Nice setup!.

Just a question, can you manually change the aperture with that adapter?.

Thanks,

Jes.


PostPosted: Sun Dec 18, 2011 1:46 pm    Post subject: Reply with quote
It's definitely Sony Alpha mount so you can use it on every Sony Alpha digital Body with all functions (include AF).
Bye the way this is an AF-lens so this is the wrong section in this forum Smile
Link to this lens on Dyxum (incl. test and sample pictures of this lens): http://www.dyxum.com/lenses/Tamron-AF-28-300-XR-F3.5-6.3-LD-AD-IF_lens177.html
It's not possible to mount this on an unmodified EOS Body with decent results.
iangreenhalgh1 wrote:
Yes but you can't control the aperture so could only shoot it wide open.

iangreenhalgh1 wrote:
...as the aperture is controlled by the body electronically....

You are wrong Smile
Jesito wrote:
Nice setup!.

Just a question, can you manually change the aperture with that adapter?.

Thanks,

Jes.


Yes you can! There are cheap adapters to NEX with aperture control availlable on e**y. It's not controlled electronically as Ian said. You can see the little pin to controll the aperture on the first twi pics posted by Smoli4.


PostPosted: Sun Dec 18, 2011 3:41 pm    Post subject: Reply with quote
Quote:
Nice setup!.

Just a question, can you manually change the aperture with that adapter?.


Thanks Smile


Yes you can, that's why the adapter has the aperture control ring. I got one like this:

http://www.ebay.com/itm/220901440806



there you have 8 steps for the aperture and like I said before.. works great.


PostPosted: Sun Dec 18, 2011 4:34 pm    Post subject: Reply with quote
This is very interesting. Unfortunately, I am very ignorant with regard to Minolta AF lenses. Am I correct in deducing that some Minolta AF lenses had mechanical aperture coupling (like the one pictured here) whilst others were fully electronic in AF and aperture. I base this observation on the fact that the camera has 8 electrical contacts whilst the lens has only 5. I assume the others on the camera are for aperture coupling. Is this correct?

Other questions:

Which AF lenses have the mechanical coupling and do they allow MF as well?
What are the impressive lenses in Tedat's post?
Do Sony Alpha cameras also retain mechanical aperture coupling. If not, is this statement correct:
ForenSeil wrote:
It's definitely Sony Alpha mount so you can use it on every Sony Alpha digital Body with all functions (include AF).


Mark


PostPosted: Sun Dec 18, 2011 5:20 pm    Post subject: Reply with quote
SXR_Mark wrote:
This is very interesting. Unfortunately, I am very ignorant with regard to Minolta AF lenses. Am I correct in deducing that some Minolta AF lenses had mechanical aperture coupling (like the one pictured here) whilst others were fully electronic in AF and aperture. I base this observation on the fact that the camera has 8 electrical contacts whilst the lens has only 5. I assume the others on the camera are for aperture coupling. Is this correct?

Other questions:

Which AF lenses have the mechanical coupling and do they allow MF as well?
What are the impressive lenses in Tedat's post?
Do Sony Alpha cameras also retain mechanical aperture coupling. If not, is this statement correct:
ForenSeil wrote:
It's definitely Sony Alpha mount so you can use it on every Sony Alpha digital Body with all functions (include AF).


Mark


Even the new very good "plastic" lenses like the 50mm F1.8 or the kit-lens have all non-electronical aperture control. The additional contacts on the newer lenses are because the AF-Motor is inside the lens on the new generation lenses (this AF system is called "SAM" and I also think it's used by SSM) while to Dynax times the AF-motor was placed in the body. But there's still an AF-motor in all modern Sony bodys so they are generally no backwarts-compatibility problems at all. Generally all lenses you can find on Dyxum work on any Sony Alpha camera.

There are only a very few exceptions with some old Sigma lenses as they have a slightly different way to transfer the rotation of the AF-motor in the body into the lens which can lead in single cases into destruction of the AF mechanism of the lens after a time.
But usually you will notice that's something is wrong as the AF-sound is very awful in most cases.

The other questions:
I've never seen or heard of a (Konica-)Minolta AF/Sony Alpha that does not allow MF. But on many (mostly cheap) lenses the MF-function is very weak/soft and without resistance exactly like with most modern kit-lenses from Sony, Nikon and Canon. It's not as easy and smooth to focus with them as with an good old Minolta MD, Canon FD, and all the others.

I've used similar AF lenses from Tamron, Sigma and Minolta on my Sony Alpha 550 without any problems. You can find some photos made with this lens on Sony Alpha Bodies on Dyxum and Flickr http://www.dyxum.com/dforum/topic11723.html

PS: Sony NEX-System has electrical aperture control

Last edited by ForenSeil on Sun Dec 18, 2011 5:56 pm; edited 2 times in total


PostPosted: Sun Dec 18, 2011 5:38 pm    Post subject: Reply with quote
As far I know the contacts have nothing to do with the aperture, all Minolta AF lenses have mechanical coupling. The other 3 contact you will find only on newer filmbodies and digital of course, lenses with 8 contacts have a "D" in their name.

Quote:
These lenses contain a distance encoder. This allows the camera to read the current focus distance from the lens. The information is used for ADI flash, and the Dynax 7 can also calculate DOF with this information. With non-D lenses you can not use ADI with many cameras. See the Flash Compendium for details.



All Minolta AF lenses also allow MF.. maybe the "xi" lenses won't work, can't tell you since I never had on of them.. didn't liked the electrical zoom at all. And yes, if you have a Minolta AF compatible lens, you can use them on every Sony Alpha body. Some older Sigma lenses may be problematic, but that's not only a Sony/Minolta problem.

Sorry if can't answer all your questions, but this website should be able do this: http://mhohner.de/?lg=e


Quote:
What are the impressive lenses in Tedat's post?


those are:

#1: Minolta AF 135/2.8 [T4.5] STF
#2: Minolta AF 80-200/2.8 HS-APO G
#3: Minolta AF 85/1.4 G (D)


PostPosted: Sun Dec 18, 2011 6:06 pm    Post subject: Reply with quote
Tedat wrote:

#1: Minolta AF 135/2.8 [T4.5] STF
#2: Minolta AF 80-200/2.8 HS-APO G
#3: Minolta AF 85/1.4 G (D)

Shocked Shocked Shocked
Bääähm! Very Happy
Congrats! These are realy f***ing great lenses!

Tedat wrote:

All Minolta AF lenses also allow MF.. maybe the "xi" lenses won't work, can't tell you since I never had on of them.. didn't liked the electrical zoom at all. And yes, if you have a Minolta AF compatible lens, you can use them on every Sony Alpha body.

I also had lenses with electrical zoom on my Alpha (there are only a very few). I also don't like electrical zooms but it worked well.
Electrical zoom (also called "Power Zoom") will give problems when using them on a NEX except with an expensive original Sony Adapter (LA-EA 2) which would even allow AF with all (Konica-)Minolta AF- and Sony Alpha lenses on NEX! But I think "Power-Zoom" lenses are all crap anyway compared to the new kit-lenses. Wink


PostPosted: Sun Dec 18, 2011 9:02 pm    Post subject: Reply with quote
Tedat wrote:
Quote:
Yes, it's Sony/Minolta Alpha mount, only useable on Sony DSLRs or Minolta Dynax/Maxxum 35mm SLRs as the aperture is controlled by the body electronically.


It's also useable on the NEX or Micro 4/3, there are adapters with a aperture control ring. I just got one for my STF, but couldn't resist to try some of my other Minolta lenses.

Works great and looks a bit "special" Laughing








Excuses for the offtopic , but :
Great system , Tedat !
Please , can you post some results using this adaptor with AF Minoltas?
(or some link)


PostPosted: Sun Dec 18, 2011 10:23 pm    Post subject: Reply with quote
Thanks guys for the comprehensive answer to my questions. Your time and trouble is much appreciated.

Mark


PostPosted: Mon Dec 19, 2011 3:50 am    Post subject: Reply with quote
One other point, unlike many other lenses with mechanically coupled aperture, the Minolta/Sony alpha mount lenses have the aperture normally closed to the smallest aperture. This means you need to be able to open it up with the adapter, otherwise the you have to shoot with F16 or F22..


PostPosted: Mon Dec 19, 2011 7:05 am    Post subject: Reply with quote
yinyangbt wrote:

Excuses for the offtopic , but :
Great system , Tedat !
Please , can you post some results using this adaptor with AF Minoltas?
(or some link)


Thanks Smile

Unfortunatly I couldn't use it very much. Except the day the adapter came it always was rainy weather and after arround 40min playing the sun was gone. So I have only few testshoots with those lenses on the NEX, sorry it's nothing special.. just wanted see it it works:


Minolta AF 80-200/2.8 HS-APO G (@ F2.8 / 200mm):






Minolta AF 85/1.4 G (D) wide open:






Minolta AF 135/2.8 [T4.5] STF:






a crop (STF):




What I can say at the moment is that this adapter works great, but if it makes sense to use Minolta AF lenses on the NEX depends on the lens itself. Those three lenses above was very easy to focus, especially the STF is so much fun to use.. even more than on my Dynax. Makes sense for me since it's designed to use it MF and the NEX can do this much better than the Dynax.

With some other lenses I tried this day like Minolta AF 35/1.4 G (D) or the AF 50/1.4 (D) manually focussing was much harder. And when I compare those results with something I get from my MF lenses, it makes no sense to use this both on the NEX. Of course they are great lenses too, but I like them better with AF.
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