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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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 Posted: Wed Aug 14, 2013 1:38 pm Post subject: SK Tele-Xenar 3.5/90mm 10 blade preset |
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JohnBar wrote:
I have just snagged this lens and the aperture is stuck wide open.
Before I get to work on it I would just like to check that there isn't some secret way of setting the aperture. The are two lugs at the filter end which are on opposite sides, but squeezing them together doesnt seem to help any.
Here is the lens
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Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
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| Posted: Wed Aug 14, 2013 2:07 pm Post subject: |
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Mos6502 wrote:
I would think that the two tabs are for opening and closing the aperture. The f stop may possibly be set by pulling and turning/pushing and turning the aperture ring such as on CZJ lenses? |
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calvin83
Joined: 12 Apr 2009
Posts: 7584
Location: Hong Kong
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| Posted: Wed Aug 14, 2013 2:15 pm Post subject: |
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calvin83 wrote:
| Mos6502 wrote: |
| I would think that the two tabs are for opening and closing the aperture. The f stop may possibly be set by pulling and turning/pushing and turning the aperture ring such as on CZJ lenses? |
+1. The preset lens rarely has stuck aperture problem unless the ring are totally frozen. Try to push/pull the ring above the two lugs and turn it in either direction.
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Wed Aug 14, 2013 2:28 pm Post subject: |
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JohnBar wrote:
There is about 1mm of rotational play but thats it.
Pulling (like preset Biotar) doesnt work
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IAZA
Joined: 16 Apr 2010
Posts: 2587
Location: Indonesia
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| Posted: Wed Aug 14, 2013 2:39 pm Post subject: |
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IAZA wrote:
Most of my Schneider lenses has problem with aperture. except from you Mos 
Usually it's coil wire is not strong anymore to pull the aperture
Sorry I dont know the right word
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Wed Aug 14, 2013 3:10 pm Post subject: |
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iangreenhalgh1 wrote:
Coil wire = spring. 
I look forward to your results with it John because I have bee after one of these for a while after finding my Tele-Xenar 4/135 to be really great.
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Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
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| Posted: Wed Aug 14, 2013 3:27 pm Post subject: |
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Mos6502 wrote:
| IAZA wrote: |
Most of my Schneider lenses has problem with aperture. except from you Mos
Usually it's coil wire is not strong anymore to pull the aperture
Sorry I dont know the right word |
Did you manage to get it fixed? I sometimes wish I had hung on to that lens for use with my Exa. |
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Wed Aug 14, 2013 3:56 pm Post subject: |
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JohnBar wrote:
Thanks all, looks like its screwdriver time. Easy enough to fix
@Ian
Something to taste till I can get deeper focus (Canon Portrait setting)
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iangreenhalgh1
Joined: 18 Mar 2011
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| Posted: Wed Aug 14, 2013 4:25 pm Post subject: |
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iangreenhalgh1 wrote:
Cheers John, that looks excellent, just like the 4/135.
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Wed Aug 14, 2013 4:29 pm Post subject: |
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JohnBar wrote:
Damn, Now I want the 4/135mm as well
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Wed Aug 14, 2013 4:33 pm Post subject: |
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iangreenhalgh1 wrote:
Good luck, they come along from time to time, mine is an old 1950s one in Diax mount, I adapted it to work on my NEX.
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Wed Aug 14, 2013 8:38 pm Post subject: |
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luisalegria wrote:
I suspect that the knob on the aperture ring is a lock for the preset mechanism, so the limit stays at the preselected aperture. It seems like it may be locked wide open. It may be working just fine except that the lock needs to be wiggled in just the right way to free the aperture limit.
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Wed Aug 14, 2013 8:55 pm Post subject: |
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iangreenhalgh1 wrote:
Horrible day here today, cloudy and raining, but I snapped a couple of shots with the 4/135 to show you what a good lens it is. No PP, just RAW-JPEG then resize for web.:
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Wed Aug 14, 2013 9:34 pm Post subject: |
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JohnBar wrote:
Great Lens!
How does the 3.5/135 compare?, is it a different recipe?
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Wed Aug 14, 2013 10:07 pm Post subject: |
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iangreenhalgh1 wrote:
I expect it's just an updated version with the same formula, but I don't actually know.
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calvin83
Joined: 12 Apr 2009
Posts: 7584
Location: Hong Kong
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| Posted: Thu Aug 15, 2013 3:36 am Post subject: |
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calvin83 wrote:
The early 3.5/135 is in 4e/3g and the later one are 5e/4g or 5e/5g(QBM version). I cannot find the diagram of 4/135 but from the reflection of my 4/135, it should be a four elements telephoto design.
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Thu Aug 15, 2013 3:37 am Post subject: |
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iangreenhalgh1 wrote:
Yes, I think it's the classical 4/3 tele-tessar design. I've not been able to find a diagram either.
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