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Tair 300mm on A6000?
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PostPosted: Mon May 08, 2017 3:52 pm    Post subject: Tair 300mm on A6000? Reply with quote
What will be the best option to adapt this lens to an A6000 camera. I have already a very thin M39 to Pentax and a Pentax to Nex adapter. Will that giver a good result in order to focus for longer distances?

I have tried some other tele lenses with other adapters and can only get objects in focus within a few hundred meters. If I try to focus on the moon, it shows only a very dull image.


PostPosted: Mon May 08, 2017 3:58 pm    Post subject: Reply with quote
Well, either the picture is in focus or not. If not in focus, that means probably you bought a (too) cheap adapter. I have had this problem with one adapter otherwise all other allow to focus at infinity.
That said, if, when you say "dull image", you mean poor in contrast, then there is not much you can do probably with that lens. More or less all old Russian lens have that characteristic. For this purpose I would rather use the old Nikkor 300mm f4.5, stopped down a bit.

Can you share a couple of photographs?

Hope it helps.


PostPosted: Mon May 08, 2017 4:15 pm    Post subject: Reply with quote
wolan wrote:
Well, either the picture is in focus or not. If not in focus, that means probably you bought a (too) cheap adapter. I have had this problem with one adapter otherwise all other allow to focus at infinity.
That said, if, when you say "dull image", you mean poor in contrast, then there is not much you can do probably with that lens. More or less all old Russian lens have that characteristic. For this purpose I would rather use the old Nikkor 300mm f4.5, stopped down a bit.

Can you share a couple of photographs?

Hope it helps.


I have tried with several lenses. Also Contax zeiss 135mm and Mamiya 645 300mm, and they will not focus at the same distance as my Sony 18-105mm.

Do you think they sell some adapters cheaper because they are some mm to long?


PostPosted: Mon May 08, 2017 4:17 pm    Post subject: Reply with quote
The best and "perfect" solution is to go for a Zenit M39 4 ring set (cheaply available from Russia) and a M39/LTM to NEX adapter (cheaply available from China).
The Zenit ring set includes a 16.4mm distance ring which is exactly the difference between M39/LTM (28.8mm flange focal distance) and Zenit M39 (45.2mm). Obviously this was done to enable the usage of Zenit/M39 lenses on the old Russian M39/LTM cameras like the Zorkis and FEDs.
My old Zenit/M39 lenses work perfectly at infinity with this solution.


PostPosted: Mon May 08, 2017 4:27 pm    Post subject: Reply with quote
Eriksen wrote:
wolan wrote:
Well, either the picture is in focus or not. If not in focus, that means probably you bought a (too) cheap adapter. I have had this problem with one adapter otherwise all other allow to focus at infinity.
That said, if, when you say "dull image", you mean poor in contrast, then there is not much you can do probably with that lens. More or less all old Russian lens have that characteristic. For this purpose I would rather use the old Nikkor 300mm f4.5, stopped down a bit.

Can you share a couple of photographs?

Hope it helps.


I have tried with several lenses. Also Contax zeiss 135mm and Mamiya 645 300mm, and they will not focus at the same distance as my Sony 18-105mm.

Do you think they sell some adapters cheaper because they are some mm to long?


I understand you have the M39 version of this lens: http://allphotolenses.com/lenses/item/c_731.html
So probably you need a M39-M42 adapter ( https://www.amazon.com/Fotodiox-Lens-Mount-Adapter-39MM/dp/B001G4QXQY ) and a M42 to Sony adapter to finally mount it on your camera.
What is your current setup?


PostPosted: Mon May 08, 2017 4:32 pm    Post subject: Reply with quote
wolan wrote:
So probably you need a M39-M42 adapter ( https://www.amazon.com/Fotodiox-Lens-Mount-Adapter-39MM/dp/B001G4QXQY ) and a M42 to Sony adapter to finally mount it on your camera.


That may not work correctly at infinity as M42 has 45.46mm flange focal distance and M39/Zenit has 45.2mm; i.e. M42 is a bit too long.


PostPosted: Mon May 08, 2017 4:38 pm    Post subject: Reply with quote
tb_a wrote:
wolan wrote:
So probably you need a M39-M42 adapter ( https://www.amazon.com/Fotodiox-Lens-Mount-Adapter-39MM/dp/B001G4QXQY ) and a M42 to Sony adapter to finally mount it on your camera.


That may not work correctly at infinity as M42 has 45.46mm flange focal distance and M39/Zenit has 45.2mm; i.e. M42 is a bit too long.


You are right, that is written also in the description section of the link I sent. However I have adapted in this way the Helios 58mm f2 (silver) and it seems to have no big problems, although I always stop down to f8 or f11 when I shoot at infinity.


PostPosted: Mon May 08, 2017 5:20 pm    Post subject: Reply with quote
I haven´t bougt the Tair lens yet, but I already have the M39 to M42 adapter, a very thin M42 to Pentax adapter and the Pentax to Nex adapter, but I understand that it will be very difficult for you to figure out if that solution will work. But should it really be neccesary to stop down in order to get objects in focus? I believe the problem occurs because the adapters are to long.


PostPosted: Mon May 08, 2017 5:59 pm    Post subject: Reply with quote
Wolan,
I've tried also the M42 adapter version but at infinity I never managed to get tack sharp pictures. Only nearly sharp if stopped down. Problem was solved for me with the M39/LTM adapter and distance ring version as explained before. That's the reason why I recommend only this correct solution which will work for sure with any Zenit/M39 lens.
However, if you are happy with your M42 solution it's fine for me as well. Wink


PostPosted: Mon May 08, 2017 6:03 pm    Post subject: Reply with quote
Eriksen wrote:
But should it really be neccesary to stop down in order to get objects in focus? I believe the problem occurs because the adapters are to long.


No. It must be too long, at least 0.26mm.


PostPosted: Mon May 08, 2017 7:25 pm    Post subject: Reply with quote
tb_a wrote:
wolan wrote:
So probably you need a M39-M42 adapter ( https://www.amazon.com/Fotodiox-Lens-Mount-Adapter-39MM/dp/B001G4QXQY ) and a M42 to Sony adapter to finally mount it on your camera.


That may not work correctly at infinity as M42 has 45.46mm flange focal distance and M39/Zenit has 45.2mm; i.e. M42 is a bit too long.


This link http://briansmith.com/flange-focal-distance-guide/ is reporting the M39 mount having the same flange distance of the M42:
M39 45.46 mm SLR 24×36mm
M42 45.46 mm SLR 24×36mm

I think the confusion is about what M39 exactly is; in the same table there is another M39 (mirrorless, Leica?) mount, with a completely different flange to mount distance...


PostPosted: Mon May 08, 2017 8:07 pm    Post subject: Reply with quote
wolan wrote:
tb_a wrote:
wolan wrote:
So probably you need a M39-M42 adapter ( https://www.amazon.com/Fotodiox-Lens-Mount-Adapter-39MM/dp/B001G4QXQY ) and a M42 to Sony adapter to finally mount it on your camera.


That may not work correctly at infinity as M42 has 45.46mm flange focal distance and M39/Zenit has 45.2mm; i.e. M42 is a bit too long.


This link http://briansmith.com/flange-focal-distance-guide/ is reporting the M39 mount having the same flange distance of the M42:
M39 45.46 mm SLR 24×36mm
M42 45.46 mm SLR 24×36mm

I think the confusion is about what M39 exactly is; in the same table there is another M39 (mirrorless, Leica?) mount, with a completely different flange to mount distance...


The information at briansmith.com is wrong. Zenit specification is 45.2mm and we are talking about M39/Zenit lenses here. The other story is the RF/Leica standard which is M39/LTM (28.8mm).
https://en.wikipedia.org/wiki/Flange_focal_distance shows it correctly now.


PostPosted: Mon May 08, 2017 10:07 pm    Post subject: Reply with quote
tb_a wrote:
Wolan,
I've tried also the M42 adapter version but at infinity I never managed to get tack sharp pictures. Only nearly sharp if stopped down. Problem was solved for me with the M39/LTM adapter and distance ring version as explained before. That's the reason why I recommend only this correct solution which will work for sure with any Zenit/M39 lens.
However, if you are happy with your M42 solution it's fine for me as well. Wink


Do you mean a ring set like this:
http://www.ebay.com/itm/Extension-Tubes-set-4x-rings-with-M39-screw-mounts-for-Zenit-SLR-NEW-BOX-OS-/322464669286?hash=item4b14645e66:g:XpwAAOSw2gxY2MT7

and an adapter like this one:

http://www.ebay.com/itm/Leica-Leitz-M39-LTM-screw-lens-adapter-to-Sony-E-mount-cameras-NEX-5R-5T-5N-6-7-/201317685587?hash=item2edf781953:g:G1IAAOSwz2lXDGve


PostPosted: Mon May 08, 2017 10:15 pm    Post subject: Reply with quote
Eriksen wrote:
tb_a wrote:
Wolan,
I've tried also the M42 adapter version but at infinity I never managed to get tack sharp pictures. Only nearly sharp if stopped down. Problem was solved for me with the M39/LTM adapter and distance ring version as explained before. That's the reason why I recommend only this correct solution which will work for sure with any Zenit/M39 lens.
However, if you are happy with your M42 solution it's fine for me as well. Wink


Do you mean a ring set like this:
http://www.ebay.com/itm/Extension-Tubes-set-4x-rings-with-M39-screw-mounts-for-Zenit-SLR-NEW-BOX-OS-/322464669286?hash=item4b14645e66:g:XpwAAOSw2gxY2MT7

and an adapter like this one:

http://www.ebay.com/itm/Leica-Leitz-M39-LTM-screw-lens-adapter-to-Sony-E-mount-cameras-NEX-5R-5T-5N-6-7-/201317685587?hash=item2edf781953:g:G1IAAOSwz2lXDGve


Yes, exactly.
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