39mm SLR mount, what is this?

[EarthQuake]

Hey guys,

I picked up an Enna-Werk 13.5cm Tele-Ennaston. It has a 39mm thread mount. I assumed this was LTM/M39 and it fits my M39 to M43 adapter, but the focus is wrong. When I free lens it it seems like the flange is closer to SLR than range finder distance. Is this like M42 mount but in 39mm thread? Is there a name for this mount/adapters available for it?

I looks like I can by a M39 to M42 step up ring but I'm not sure if the flange distance will be correct.

Thanks

 

[James Pickford]

My guess would be that it’s designed for use on the Braun Paxette system which has an M39 screw mount but a longer registration distance of 44mm.

If that’s the case and you can get a suitable extension tube (15.2mm) then you may be able to focus properly

For example this one on Ebay: https://www.ebay.com/itm/Braun-Paxe...474411?hash=item2f1b2e2eeb:g:MwkAAOSwGPxZ57YQ

 

[Suave]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

 

[Tom Caldwell]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

--
Tom Caldwell

 

[ThomasB]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.

However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

 

[bill pasuquin]

Heres a Braun Super 11 BL with a Stable-Telexon 135mm 3.8,second one Dejur D-3 with silver Tele-Ennalyt 135mm 3.5 both take 39mm mount.for rangefinder cameras,not Leica mount

 

[Sjak]

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Recently, I came across Zenit M39-adapters that do not need stacking of adapters. Comments were that these are vry accurate. Will look this up, as this can be interesting for the users of Zenit-lenses. And maybe the seller has other adapters too

 

[ThomasB]

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Recently, I came across Zenit M39-adapters that do not need stacking of adapters. Comments were that these are vry accurate. Will look this up, as this can be interesting for the users of Zenit-lenses. And maybe the seller has other adapters too

I have several Zenit M39 SLR lenses and struggled a lot until I found the original Zenit M39 distance ring set (available from Russia or Ukraine for something like EUR 10.-). The included 16.4 mm ring solved my problems. That's exactly the distance you need and the additional rings give you close focus/macro capabilities as an extra bonus for free. Everything else is like a lottery. Obviously Zenit produced it like this to enable the use of such lenses on Zorki/FED RF cameras as well. Infinitly works perfectly as indicated on lens.

 

[EarthQuake]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Fantastic info.

I tried this on an M42-M43 adapter, just holding the lens in place and infinity didn't seem to be possible, it was focusing just under infinity. I'll look into those extension tubes, thanks!

 

[Tom Caldwell]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Thanks for clarifying my post Thomas. I did buy a number of Z39-M42 adapter rings from a Chinese vendor some time ago - the cost was AUD$1 each post free. The adapters work perfectly wih Z39. I suppose that we have to be sure that these rings are the correct ones that provide for the slight difference in flange focal length and are not step-up rings that maintain the previous unadapted focal length.

 

[ThomasB]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Thanks for clarifying my post Thomas. I did buy a number of Z39-M42 adapter rings from a Chinese vendor some time ago - the cost was AUD$1 each post free. The adapters work perfectly wih Z39. I suppose that we have to be sure that these rings are the correct ones that provide for the slight difference in flange focal length and are not step-up rings that maintain the previous unadapted focal length.

Tom, the problem with Zenit is that M42 is slightly too long. If you use e.g. the MIR-1 37mm/F2.8 this 0.26 mm difference already is problematic. On the other hand it may work with the Jupiter-11 135mm/F4 when stopping further down.

No ring is able to REDUCE the M42 register distance as required.

Really tack sharp infinity focus is only possible when used as already described. The Zenit/M39 lenses are better than many people who still use them on M42 adapters would ever believe. ;-)

 

[ThomasB]

M39 mount preceeded M42 and has the same flange distance. You see it on some older German and Soviet lenses. M39-M42 rings are widely available and dirt cheap.

I call this the “Zenit-39” or “Z39” for want of a better descripton as the Z39 was the mount format for the early Zenit cameras (at least) from memory there is a fractional difference between Z39 and M42 but the adapting rings are indeed cheap and efficient. There is an issue iin getting the adapting ring off again if it locks itself on to the wrong component o leave the removal spanner lugs (on one side only) so that the adapter can be screwed out of the hadest side to remove.

Some Russian lenses come with the adapter ring already installed so that it can be used with Z39 and M42 screw mounts.

Also could be Braun Paxette M39 (as James has already noted).

The Zenit M39 SLR mount is 45.2 mm flange focal distance and the M42 is 45.46 mm. Therfore you might face troubles with infinity focus when you try to adapt these Zenit lenses on a M42 adapter with a M39 to M42 ring. The best way to use these lenses is on a 16.4 mm Zenit M39 distance ring (included in the standard Zenit 4-ring set) and a regular M39/LTM adapter.
However, those Enna lenses in question have never been produced for Zenit therefore it must be a M39 Paxette mount with 44 mm register distance. The only way to use these lenses is (as already mentioned) with a special 15.2 mm distance ring on a regular M39/LTM adapter.

Fantastic info.

I tried this on an M42-M43 adapter, just holding the lens in place and infinity didn't seem to be possible, it was focusing just under infinity. I'll look into those extension tubes, thanks!

You're welcome.

I have this special 15.2 mm extension tube (from RareAdapters.com) for an ISCO Westron 35mm/F3.5 in M39 Paxette mount and it works perfectly well.

--
Regards, Thomas Bernardy

 

[Tom Caldwell]

I have a few Russian lenses that came with the Z39-M42 factory adapter ring fitted and they probably always had been used as M42 lenses but had the capacity to retro-fit back on an originla Zenit camera body if desired. I presume that their infinity focus was preserved but have not put this to and ultimate test.

When I ended up with one lens that came as bought with Z39 only I bought several cheap Chinese Z39-M42 adapters and it seemed to do the job well enough even though it was made in alumnium and fragile. It only had spanner notches on one side and care had to be used to fit it the correct way - we didn’t want it to “disappear” into the female part of an adapter with the notches facing the wrong way* - at least on the male part it can be broken off it we are desperate as they only cost AUD$1 post free.

*This is a debateable point as if we have a M42 adapter of the type with a removeable insert it might be possible to access the covered notches of a stuck adapter. In this case the reverse fitting direction might be true.