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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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 Posted: Wed Dec 07, 2011 1:19 pm Post subject: PENTACON 50/1.8 M42 with NEX-5 problem |
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zedgraphics wrote:
Hi, i'm a newbie in MFlenses and digital cameras.
I have a Pentacon 50/1.8 mounted with a M42 on a NEX-5 and i have few problems.
First, my focus works only between 0,40 and 1 (half of maximum focus)
Second, the picture looks like a zoomed picture (±200%).
Question: is the problem the distance between the sensor and the lens that is not the native distance, or i need to fix something in the lens?
Thanks for your answers.
Alex |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Wed Dec 07, 2011 1:51 pm Post subject: |
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peterqd wrote:
Hello and welcome Alex.
It sounds like an issue with the distance between the mount faces of the lens and the camera. With an M42 lens on the NEX this should be about 27mm. Are you using a proper M42>NEX adapter?
Or do you mean the focus dial on the lens is jamming? Is this OK when the lens isn't mounted on the camera?
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Peter - Moderator |
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Keysersoze27
Joined: 19 Feb 2009
Posts: 466
Location: Greece
Expire: 2012-12-24
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| Posted: Wed Dec 07, 2011 1:54 pm Post subject: |
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Keysersoze27 wrote:
Alex,
Welcome on board.
The Pentacon lens you own is build for Full Frame cameras(36x24mm). Your Nex-5 uses a crop sensor (APC-C,23x15mm) . So your lens is not a 50mm after you attach it but actually more or less like a 50x1.5=75mm since your sensor is 1.5x focal length crop.
That's why it looks like it zoomed when you shoot with it;)
Give a little more detail about your focus problem...
Unless your adapter is so wrong that you actually hit the sensor when you try to focus pass the 1m
_________________
Canon EOS 5D MkII , EOS 50E, Contax RTS, Olympus OM2n, Nikon Z6ii
28mm: Zeiss Distagon 2.8/28 MMJ
35mm: CZ Distagon 2/35 ZE , S-M-C Takumar 3.5/35
40mm: CZJ Tessar T 4.5/40 1Q
50mm: CZ Planar 1.4/50 MMJ,CZ Planar 1.7/50 AEJ+MMJ,Leica Summicron 2/50 v3,S-M-C Takumar 1.4/50,Pentax SMC 1.4/50 K,Pentax SMC 1.8/55 K,Nikkor 1.8/50 ,CZJ Tessar T 3.5/50 1Q , CZ Planar 1.8/50 (QBM),Zuiko 1.4/50, Zuiko 1.8/50, Icarex Tessar 2.8/50, Nikkor 2/50 Ai,Schneider Kreuznach Xenar 2.8/50 Preset, Pentacon Prakticar 2.4/50 MC v1, CZJ Pancolar 1.8/50 Zebra , Rikenon 1.4/50 P
55mm: Fujinon 1.8/55 EBC
58mm: Helios MC 44-3 2/58
85mm: Zeiss Sonnar 2.8/85 AEJ
90mm: Voigtl�nder APO-Lanthar 3.5/90 SLII , Leica Elmarit-R 2.8/90 v2
100~105mm:Zeiss Sonnar 3.5/100 MM, Nikkor 2.5/105 AiS, S-M-C Takumar 2.8/105
135mm: Leica Elmarit R 2.8/135 v2, S-M-C Takumar 3.5/135, CZJ 4/135 Sonnar Exakta leatherette (1963),CZJ 4/135 Triotar
Macro:Leica Macro-Elmarit R 2.8/60, Micro-Nikkor Auto 3.5/55 Compensating type (1964) |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 2:09 pm Post subject: |
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zedgraphics wrote:
Firstly, Thank you for your welcoming and sorry for my poor english 
Well, i understand the distance problem between old lenses and gigital sensors, but i tought that the M42 adapter (Leinox label) could fix that problem 
and my zoom diference is near 300%
Also for the focus problem, the focus ring works only between 0,40 and 1. But from 1 to ∞ (infinity) the ring doesnt turn. it stops at 1.
Is this a lens problem? did the focus distance have an influance with this problem? is there something i can fix in the camera options?
A lot of questions  thanks for your answers guys 
Alex |
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Keysersoze27
Joined: 19 Feb 2009
Posts: 466
Location: Greece
Expire: 2012-12-24
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| Posted: Wed Dec 07, 2011 2:22 pm Post subject: |
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Keysersoze27 wrote:
As Peter remarked, does your lens focus pass >1m when it's not attached to either your adapter and camera ?
_________________
Canon EOS 5D MkII , EOS 50E, Contax RTS, Olympus OM2n, Nikon Z6ii
28mm: Zeiss Distagon 2.8/28 MMJ
35mm: CZ Distagon 2/35 ZE , S-M-C Takumar 3.5/35
40mm: CZJ Tessar T 4.5/40 1Q
50mm: CZ Planar 1.4/50 MMJ,CZ Planar 1.7/50 AEJ+MMJ,Leica Summicron 2/50 v3,S-M-C Takumar 1.4/50,Pentax SMC 1.4/50 K,Pentax SMC 1.8/55 K,Nikkor 1.8/50 ,CZJ Tessar T 3.5/50 1Q , CZ Planar 1.8/50 (QBM),Zuiko 1.4/50, Zuiko 1.8/50, Icarex Tessar 2.8/50, Nikkor 2/50 Ai,Schneider Kreuznach Xenar 2.8/50 Preset, Pentacon Prakticar 2.4/50 MC v1, CZJ Pancolar 1.8/50 Zebra , Rikenon 1.4/50 P
55mm: Fujinon 1.8/55 EBC
58mm: Helios MC 44-3 2/58
85mm: Zeiss Sonnar 2.8/85 AEJ
90mm: Voigtl�nder APO-Lanthar 3.5/90 SLII , Leica Elmarit-R 2.8/90 v2
100~105mm:Zeiss Sonnar 3.5/100 MM, Nikkor 2.5/105 AiS, S-M-C Takumar 2.8/105
135mm: Leica Elmarit R 2.8/135 v2, S-M-C Takumar 3.5/135, CZJ 4/135 Sonnar Exakta leatherette (1963),CZJ 4/135 Triotar
Macro:Leica Macro-Elmarit R 2.8/60, Micro-Nikkor Auto 3.5/55 Compensating type (1964) |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Wed Dec 07, 2011 2:26 pm Post subject: |
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peterqd wrote:
If you are using an adapter like this there should be no problems like you describe.
http://tinyurl.com/cmbwjtj
It sounds like there is a big problem with the lens and there is nothing you can do with the camera that will cure it. Can you post some pictures of it?
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Peter - Moderator |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 2:26 pm Post subject: |
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zedgraphics wrote:
| Keysersoze27 wrote: |
Alex,
Unless your adapter is so wrong that you actually hit the sensor when you try to focus pass the 1m |
Actually (if i do understand your answer), the back lens dont hit the sensor because M42 adapter is very long.
I wonder if the problem is not coming from the lens itself. because it was hard to turn the ring, and i found some sand in the top of lens thread, while cleaning it with the edge of paper.
Thanks. Alex. |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15685
Expire: 2014-01-07
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| Posted: Wed Dec 07, 2011 2:28 pm Post subject: |
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iangreenhalgh1 wrote:
If the lens focus ring won't turn to infinity then the lens has a fault.
Pentacon 1.8/50 works great on NEX-3 for me:
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I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 2:34 pm Post subject: |
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zedgraphics wrote:
Yes, thats the right adaptor from Leinox. i'll send you the picture of both camera, ring & lens.
Cheers. 
Alex |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 2:35 pm Post subject: |
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zedgraphics wrote:
| iangreenhalgh1 wrote: |
If the lens focus ring won't turn to infinity then the lens has a fault.
Pentacon 1.8/50 works great on NEX-3 for me:
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Yes i know, i have the same kind of picture, but shoot at a distance of 1 m from the subject 
That said, your photo is beautiful!
Cheers.
Alex
Last edited by zedgraphics on Wed Dec 07, 2011 2:51 pm; edited 2 times in total |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 2:46 pm Post subject: |
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zedgraphics wrote:
| peterqd wrote: |
| Can you post some pictures of it? |
Here's a ugly picture of my camera set taken from my iPhone 
(you can see also the focus ring turned to maximum thread)
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Keysersoze27
Joined: 19 Feb 2009
Posts: 466
Location: Greece
Expire: 2012-12-24
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| Posted: Wed Dec 07, 2011 2:57 pm Post subject: |
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Keysersoze27 wrote:
At 1m the front of the lens should be more protruding than yours!!!
like this :
Someone has wrongly repaired and reassembled the lens
_________________
Canon EOS 5D MkII , EOS 50E, Contax RTS, Olympus OM2n, Nikon Z6ii
28mm: Zeiss Distagon 2.8/28 MMJ
35mm: CZ Distagon 2/35 ZE , S-M-C Takumar 3.5/35
40mm: CZJ Tessar T 4.5/40 1Q
50mm: CZ Planar 1.4/50 MMJ,CZ Planar 1.7/50 AEJ+MMJ,Leica Summicron 2/50 v3,S-M-C Takumar 1.4/50,Pentax SMC 1.4/50 K,Pentax SMC 1.8/55 K,Nikkor 1.8/50 ,CZJ Tessar T 3.5/50 1Q , CZ Planar 1.8/50 (QBM),Zuiko 1.4/50, Zuiko 1.8/50, Icarex Tessar 2.8/50, Nikkor 2/50 Ai,Schneider Kreuznach Xenar 2.8/50 Preset, Pentacon Prakticar 2.4/50 MC v1, CZJ Pancolar 1.8/50 Zebra , Rikenon 1.4/50 P
55mm: Fujinon 1.8/55 EBC
58mm: Helios MC 44-3 2/58
85mm: Zeiss Sonnar 2.8/85 AEJ
90mm: Voigtl�nder APO-Lanthar 3.5/90 SLII , Leica Elmarit-R 2.8/90 v2
100~105mm:Zeiss Sonnar 3.5/100 MM, Nikkor 2.5/105 AiS, S-M-C Takumar 2.8/105
135mm: Leica Elmarit R 2.8/135 v2, S-M-C Takumar 3.5/135, CZJ 4/135 Sonnar Exakta leatherette (1963),CZJ 4/135 Triotar
Macro:Leica Macro-Elmarit R 2.8/60, Micro-Nikkor Auto 3.5/55 Compensating type (1964) |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 3:20 pm Post subject: |
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zedgraphics wrote:
| Keysersoze27 wrote: |
Someone has wrongly repaired and reassembled the lens |
Yes, i think so. Can i fix-it myself? i have Fairy fingers and i am very patient if you see repair instructions somewhere, let me know.
Thanks again, Alex |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Wed Dec 07, 2011 4:02 pm Post subject: |
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peterqd wrote:
| zedgraphics wrote: |
| Keysersoze27 wrote: |
Someone has wrongly repaired and reassembled the lens |
Yes, i think so. Can i fix-it myself? i have Fairy fingers and i am very patient if you see repair instructions somewhere, let me know.
Thanks again, Alex |
The two parts of the focussing helicoil have a multi-start thread and it sounds very much as though it has been wrongly threaded. You'll need to take it apart again and find the correct thread. This sounds easy but.... Much patience is needed.
There could be other things wrong too, if someone has reassembled it that poorly.
http://gabriel.mp3-tech.org/blog/index.php?entry=entry080827-180800
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Wed Dec 07, 2011 4:51 pm Post subject: |
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zedgraphics wrote:
| peterqd wrote: |
| zedgraphics wrote: |
| Keysersoze27 wrote: |
Someone has wrongly repaired and reassembled the lens |
Yes, i think so. Can i fix-it myself? i have Fairy fingers and i am very patient if you see repair instructions somewhere, let me know.
Thanks again, Alex |
The two parts of the focussing helicoil have a multi-start thread and it sounds very much as though it has been wrongly threaded. You'll need to take it apart again and find the correct thread. This sounds easy but.... Much patience is needed.
There could be other things wrong too, if someone has reassembled it that poorly.
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Thank you for your help, i'm going to try to fix the focus  |
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woodrim
Joined: 14 Jan 2010
Posts: 4060
Location: Charleston
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| Posted: Wed Dec 07, 2011 7:05 pm Post subject: |
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woodrim wrote:
It is only a very confident man that will admit to "Fairy fingers".
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Regards,
Woodrim |
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GT
Joined: 23 Nov 2011
Posts: 11
Location: Italy
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| Posted: Thu Dec 08, 2011 12:48 am Post subject: |
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GT wrote:
That's what I thought too : )
Un aveu très intéressant, I should say. |
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Thu Dec 08, 2011 9:48 am Post subject: |
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zedgraphics wrote:
since I was little I love dismantle and assemble little precious things and my mother gave me this little nickname
But i'm not going to fix this lens because i dont have the patience that i had when i was a kid...
The alternative is that i can change my broken Pentacon 50/1.8 (which can be repaired) with a 50/1.7 Pancolar for ± 20 bucks more.
What is the fastest lens with a better contrast between those two?
thanks again
Alex |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Thu Dec 08, 2011 9:55 am Post subject: |
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peterqd wrote:
This is a fabulous deal! The Pancolar is on a different quality level to the Pentacon altogether - the best 50mm CZJ ever produced. Just make sure the blades are working freely, they can often become sticky and need cleaning.
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Thu Dec 08, 2011 10:16 am Post subject: |
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zedgraphics wrote:
| peterqd wrote: |
| This is a fabulous deal! The Pancolar is on a different quality level to the Pentacon altogether - the best 50mm CZJ ever produced. Just make sure the blades are working freely, they can often become sticky and need cleaning. |
Thanks for your advice peter
An other question linked with CZ 50mm lenses, is Planar T* better than Pancolar lens?
Cheers. Alex |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Thu Dec 08, 2011 10:38 am Post subject: |
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peterqd wrote:
I've never used any Zeiss west lenses myself so I can't compare directly. Orio has hundreds of them though, and he states in this thread that the Pancolar is sharper. The build quality of the Planars is probably better, the CZJ lenses are more variable, and I would expect the Planars have better wide-open performance. The Pancolar needs to be stopped down to 4 or 5.6 to make it shine.
When I bought my first Praktica in 1969, the Pancolar was the most expensive kit lens option. I got the cheapest (Domiplan) and I've regretted it ever since!
Here's a gallery of pictures taken with the zebra version. The coating was improved on later models which makes it a little more contrasty. Which version is yours?
http://www.mflenses.com/gallery/v/german/zeiss/pancolar/pnacolar_50mm_f1_8_zebra/?
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zedgraphics
Joined: 07 Dec 2011
Posts: 17
Location: Brussels
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| Posted: Thu Dec 08, 2011 11:16 am Post subject: |
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zedgraphics wrote:
| peterqd wrote: |
I've never used any Zeiss west lenses myself so I can't compare directly. Orio has hundreds of them though, and he states in this thread that the Pancolar is sharper. The build quality of the Planars is probably better, the CZJ lenses are more variable, and I would expect the Planars have better wide-open performance. The Pancolar needs to be stopped down to 4 or 5.6 to make it shine.
When I bought my first Praktica in 1969, the Pancolar was the most expensive kit lens option. I got the cheapest (Domiplan) and I've regretted it ever since!
Here's a gallery of pictures taken with the zebra version. The coating was improved on later models which makes it a little more contrasty. Which version is yours? |
Thanks for your interest to my questions and your links Peter
My (future) Pancolar is a 1,8/50 MC i think so (i dont no if it is an AUTO version) but i think its a newer version than the zebra. Do you know this version? |
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