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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Tue Jun 29, 2021 10:50 pm Post subject: Zorki 4K Jupiter 8 ...Focus issue on Sony E-mount |
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bwfcnottingham wrote:
Today I bought a Zorki 4K complete with a beautiful Jupiter 8 50mm F2 lens
The lens focus ring moves sweetly and the aperture opens and closes perfectly
I was excited as I love shooting portraits and I was keen to try it out
When I attached it to my Sony A6000 using a L39 to E-mount adapter I have some focus issues
The nearest I can focus is when the subject is about 3 metres away from the camera and I get to infinity focus when the distance on the lens is about 4 metres. This means I cannot use the lens as I want to.
The adapter works fine for my Industar N61 lenses and my Dad's 1950's leica lenses.
I thought it might need an M42-L39 spacer, but that wont focus anywhere !
Btw the focus ring moves all the way through the scale .
Am I missing a trick? Can anyone help me with a solution to this issue
Many Thanks
#1
_________________ Regards, Phil |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Wed Jun 30, 2021 9:36 am Post subject: |
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bwfcnottingham wrote:
Do I need an m39 adapter as opposed to a L39 adapter . I have been browsing various geek forums .
I thought they were the same _________________ Regards, Phil |
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calvin83
Joined: 12 Apr 2009 Posts: 7555 Location: Hong Kong
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Posted: Wed Jun 30, 2021 11:29 am Post subject: |
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calvin83 wrote:
Take a look at this guide. You may need to add a shim below the optical block as show on the middle of the 2nd photo.
https://yukosteel.wordpress.com/2019/03/09/mod-jupiter-8-50mm-f2-0-focus-to-0-6m/ _________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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D1N0
Joined: 07 Aug 2012 Posts: 2530
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Posted: Wed Jun 30, 2021 11:35 am Post subject: |
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D1N0 wrote:
It's probably the lens, not the adapter that is the problem. Does it overshoot infinity? _________________ pentaxian |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Wed Jun 30, 2021 11:52 am Post subject: |
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bwfcnottingham wrote:
D1N0 wrote: |
It's probably the lens, not the adapter that is the problem. Does it overshoot infinity? |
Thanks ,
Yes infinity focus is half way on the focus ring , if I turn the ring to infinity it is out of focus _________________ Regards, Phil |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Wed Jun 30, 2021 11:53 am Post subject: |
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bwfcnottingham wrote:
Thanks for the link
Wow this is outside my comfort zone .
So will M39 as opposed to L39 work ? _________________ Regards, Phil |
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D1N0
Joined: 07 Aug 2012 Posts: 2530
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Posted: Wed Jun 30, 2021 12:58 pm Post subject: |
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D1N0 wrote:
m39 and l39 is the same (apart from early Zenit SLR M39, but the Jupiter 8 is a rangefinder lens, so that is not the case). You could try to use a short extension tube for closer focussing if you are not comfortable opening the lens up. Another technique I use with longer close focussing distances and screw mount lenses is turning the lens out of the thread as far as I dare and focus by moving the camera.
There is probably a problem with infinity adjustment due to somebody servicing the lens without really knowing what they were doing. _________________ pentaxian |
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visualopsins
Joined: 05 Mar 2009 Posts: 10954 Location: California
Expire: 2025-04-11
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Posted: Wed Jun 30, 2021 1:58 pm Post subject: |
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visualopsins wrote:
How's the focus range on the Zorki? _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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calvin83
Joined: 12 Apr 2009 Posts: 7555 Location: Hong Kong
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Posted: Wed Jun 30, 2021 3:38 pm Post subject: |
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calvin83 wrote:
bwfcnottingham wrote: |
D1N0 wrote: |
It's probably the lens, not the adapter that is the problem. Does it overshoot infinity? |
Thanks ,
Yes infinity focus is half way on the focus ring , if I turn the ring to infinity it is out of focus |
You only need to do step 1.... _________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Wed Jun 30, 2021 6:16 pm Post subject: Re: Zorki 4K Jupiter 8 ...Focus issue on Sony E-mount |
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Lightshow wrote:
bwfcnottingham wrote: |
Today I bought a Zorki 4K complete with a beautiful Jupiter 8 50mm F2 lens
The lens focus ring moves sweetly and the aperture opens and closes perfectly
I was excited as I love shooting portraits and I was keen to try it out
When I attached it to my Sony A6000 using a L39 to E-mount adapter I have some focus issues
The nearest I can focus is when the subject is about 3 metres away from the camera and I get to infinity focus when the distance on the lens is about 4 metres. This means I cannot use the lens as I want to. |
When you notice the focus range shifted toward the camera, it's a sign the optics is too far from the focal plane.
When the focus range is shifted towards infinity, it's a sign the optics are too close to the focal plane.
If the image quality is good, it's likely that the lens needs shims to correctly calibrate or offset the optics to where they need to be.
Set the lens to infinity, measure the length of the lens, then set the focus so infinity is sharp, measure the lens length again.
Subtract the two measurements and this will tell you how thick the shim needs to be.
You can order a shim from RAF camera, all you need is 3 measurements I.D., O.D., and thickness, some kind soul could measure the I.D. and O.D. of the shim from their lens.
Test fit the new shim to see how close infinity is, falling short of infinity is a good thing, it means the shim is slightly too thick, all you need to do is sand the side a bit with 600-800 grit sandpaper and frequently test for infinity focus.
Quote: |
The adapter works fine for my Industar N61 lenses and my Dad's 1950's leica lenses.
I thought it might need an M42-L39 spacer, but that wont focus anywhere ! |
Nope, looks to me it needs a shim, either in the lens(the proper place to shim so that the lens will be correct on any LTM adapter.
You could shim the adapter if it's a 2 piece adapter but the lens will require the adapter to be permanently mounted, the adapter will only be useful with this lens.
Quote: |
Btw the focus ring moves all the way through the scale .
Am I missing a trick? Can anyone help me with a solution to this issue.
Many Thanks
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You could make a shim, or buy a donor lens and use its shim. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Wed Jun 30, 2021 7:04 pm Post subject: |
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bwfcnottingham wrote:
visualopsins wrote: |
How's the focus range on the Zorki? |
Hi visualopsins, the lens on the zorki focusses ok , right up to 1 metre and infinity. What does that mean ? _________________ Regards, Phil |
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alex ph
Joined: 16 Mar 2013 Posts: 1662
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Posted: Wed Jun 30, 2021 7:08 pm Post subject: |
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alex ph wrote:
I am interested in the results of your investigtion, as it may shed light on a similarly mysterious behaviour of Voigtlander lenses on DKL adapter I experimented. |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Wed Jun 30, 2021 7:19 pm Post subject: Re: Zorki 4K Jupiter 8 ...Focus issue on Sony E-mount |
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bwfcnottingham wrote:
[/quote]
You could make a shim, or buy a donor lens and use its shim.[/quote]
AHH right this is getting quite technical and geeky . I've only took apart two lenses . A beautiful CZ Jenna 135 mm that I thought needed lubricating and ended up breaking the aperture pin mechanism and a Pentax 135mm SMC that is still in bits ,I need to put the aperture return spring back on , so my track record isn't proven !!! _________________ Regards, Phil |
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visualopsins
Joined: 05 Mar 2009 Posts: 10954 Location: California
Expire: 2025-04-11
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Posted: Wed Jun 30, 2021 7:53 pm Post subject: |
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visualopsins wrote:
bwfcnottingham wrote: |
visualopsins wrote: |
How's the focus range on the Zorki? |
Hi visualopsins, the lens on the zorki focusses ok , right up to 1 metre and infinity. What does that mean ? |
The need to duplicate the Zorki camera register distance, from rear of mount to film plane, with the adapter used when mounting lens on Sony A6000 -- this will enable lens use on both Zorki and on A6000. I can't find distance for Zorki. Anybody know? You can perhaps measure it carefully -- remove lens, open shutter, measure from front of lens mount to film plane. Subtracting Sony A6000 register distance from that distance gives how thick must be the adapter...
(I'm not a fan of modifying lens adjustments to "make it work" on another camera. ) _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
Last edited by visualopsins on Thu Jul 01, 2021 6:42 am; edited 1 time in total |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Thu Jul 01, 2021 3:45 am Post subject: |
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Lightshow wrote:
bwfcnottingham wrote: |
visualopsins wrote: |
How's the focus range on the Zorki? |
Hi visualopsins, the lens on the zorki focusses ok , right up to 1 metre and infinity. What does that mean ? |
Well, that changes things, it doesn't work right on the adapter that other lenses do work correctly on, and it works fine on the Zorki... honestly that's bizarre, does the other lenses work as they should on the Zorki?
I'm beginning to think the lens was adjusted to work on that body, which means a dedicated adapter that is modified to work with the lens, or go find another J8, this is my recommendation. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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Alex TG
Joined: 13 Oct 2019 Posts: 221 Location: Ukraine
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Posted: Thu Jul 01, 2021 8:47 am Post subject: |
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Alex TG wrote:
visualopsins wrote: |
I can't find distance for Zorki. Anybody know? |
28.8mm, exactly the same as for LTM/L39
bwfcnottingham wrote: |
the lens on the zorki focusses ok , right up to 1 metre and infinity |
How did you check this? With just the rangefinder (which may be thrown off on the lens side) or directly at the film plane? |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Thu Jul 01, 2021 11:26 am Post subject: |
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bwfcnottingham wrote:
Alex TG wrote: |
visualopsins wrote: |
I can't find distance for Zorki. Anybody know? |
28.8mm, exactly the same as for LTM/L39
bwfcnottingham wrote: |
the lens on the zorki focusses ok , right up to 1 metre and infinity |
How did you check this? With just the rangefinder (which may be thrown off on the lens side) or directly at the film plane? |
All
I thought the Jupiter was focussing ok on the zorki , but when I put my industar n61 on the zorki it focusses much more sharper and clearer so I conclude the Jupiter 8 isn't right .
Thanks for all the advice ,dunno wot to do next _________________ Regards, Phil |
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Lloydy
Joined: 02 Sep 2009 Posts: 7786 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Thu Jul 01, 2021 11:53 am Post subject: |
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Lloydy wrote:
I've just tried my Jupiter 8, taken off a Zorki 4K, on my A7II using a M39 adapter and it works perfectly. The adapter is 10.7 mm between the Sony lens mount face and the rear face of the Jupiter. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Thu Jul 01, 2021 1:33 pm Post subject: |
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bwfcnottingham wrote:
Lightshow wrote: |
bwfcnottingham wrote: |
visualopsins wrote: |
How's the focus range on the Zorki? |
Hi visualopsins, the lens on the zorki focusses ok , right up to 1 metre and infinity. What does that mean ? |
Well, that changes things, it doesn't work right on the adapter that other lenses do work correctly on, and it works fine on the Zorki... honestly that's bizarre, does the other lenses work as they should on the Zorki?
I'm beginning to think the lens was adjusted to work on that body, which means a dedicated adapter that is modified to work with the lens, or go find another J8, this is my recommendation. |
Lightshow see my earlier comment I thought the Jupiter was focussing ok on the zorki ( I have 60 something year old eyes ) but my industar n61 on the zorki is pin sharp throughout the focus range , which I guess means the Jupiter is broken / no good . I should have tried to focus it in the shop through the zorki but was seduced by the smooth focus ring and aperture . A £35 error on my behalf , although I have a cool looking camera for my vintage lens shelf 📷📷 _________________ Regards, Phil |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Thu Jul 01, 2021 1:55 pm Post subject: |
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bwfcnottingham wrote:
I just separated the lens , it's like a jam jar , yo twist the focus ring one way and the aperture ring the other way and you get access to the inside . There was a shim ring inside . I removed it and focussed again . This time infinity was reached at 1m on the ring . I assume if I get some more rings it will sort itself out . Any ideas where I can get some _________________ Regards, Phil |
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Slalom
Joined: 10 Dec 2017 Posts: 158 Location: Stourbridge
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Posted: Thu Jul 01, 2021 3:57 pm Post subject: |
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Slalom wrote:
I suggest you try to match the spacer to a filter, then look for fiilters that have a screw on part holding the glass in place, Amazon basics were like that, Then take the glass out of a filter and see how it goes in to the jam jar and sits with the spacer. If you need a lot it may be expensive, But at least filters are Black, you don't want anything shiney
In any case the filter size will give you a good idea of what else to look at. |
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D1N0
Joined: 07 Aug 2012 Posts: 2530
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Posted: Thu Jul 01, 2021 4:47 pm Post subject: |
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D1N0 wrote:
Maybe some black rubber o-ring(s) will work. They are available in many sizes and cheap. _________________ pentaxian |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Thu Jul 01, 2021 6:38 pm Post subject: |
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Lightshow wrote:
bwfcnottingham wrote: |
I just separated the lens , it's like a jam jar , yo twist the focus ring one way and the aperture ring the other way and you get access to the inside . There was a shim ring inside . I removed it and focussed again . This time infinity was reached at 1m on the ring . I assume if I get some more rings it will sort itself out . Any ideas where I can get some |
Take the little shim ring to a machine shop and see what they can come up with for making a few of them at different thicknesses, at the very least you can use the ring as a template and cut out some pop cans into squares, drill the centres or cut with an Xacto blade, cut them round and remove any burrs then bolt them together and file the outside diameter, you could chuck the bolt in a drill to speed up the process. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Fri Jul 02, 2021 7:11 am Post subject: |
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bwfcnottingham wrote:
D1N0 wrote: |
Maybe some black rubber o-ring(s) will work. They are available in many sizes and cheap. |
Thank you everyone for your help and advice . The response to my call for help has been fabulous.
Once I get it fixed , I will post some photos . Thanks again everyone 😊📷 _________________ Regards, Phil |
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bwfcnottingham
Joined: 19 Feb 2019 Posts: 123 Location: Nottingham, England, UK
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Posted: Sun Jul 04, 2021 11:41 pm Post subject: (RESOLVED) Zorki 4K Jupiter 8 ...Focus issue on Sony E-mount |
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bwfcnottingham wrote:
Hi All
I managed to fix my focus issues
I went to a couple of hardware shops, lens and little spacer in hand.
Neither shop could find a suitable ring, so I was disappointed.
I decided to ask my neighbour, a retired engineer, if he knew anywhere that could supply one.
Dave said he could try to make one for me on his lathe and took the little spacer away with him.
He returned about 10 minutes later, he'd printed one on his 3D printer !
It didn't quite fit as the edges were a little rough
He returned 15 minutes later with three and we placed a couple into the lens.
Hey presto it worked ! Well when I say worked, it can close focus OK and focus to infinity too, although infinity is a bit before the infinity marker on the lens barrel. I think I can faff around with the three spaces and the original to get a perfect fit.
Here's a photo of Dave, Sony A6000 and fairly wide open aperture
_________________ Regards, Phil |
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