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Analog lex
Joined: 10 Nov 2013
Posts: 95
Location: East Europe
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 Posted: Tue Jan 28, 2014 3:28 pm Post subject: silver Jupiter 11 - low temperature problem? |
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Analog lex wrote:
I bought this lens in november, and never shoot with it in "comfort weather" outdoors, but tried to shoot in under 0 C° weather.
This lens just cant reach "infinity".
few today examples (-21C°):
All of this pictures taken in "infinity focus" position, and grip seen in less than 20m(i use just "path" in Google Earth). But, when i try to focus indoors from window, on some 95-330m far from me houses, anything focus right(except window glass distortions off course).
Is low temperatures affects lens optics so much? 
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Tue Jan 28, 2014 3:35 pm Post subject: |
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ZoneV wrote:
It could be cold grease at the end of the helicoid.
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Analog lex
Joined: 10 Nov 2013
Posts: 95
Location: East Europe
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| Posted: Tue Jan 28, 2014 3:41 pm Post subject: |
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Analog lex wrote:
| ZoneV wrote: |
| It could be cold grease at the end of the helicoid. |
Not sure... All rings turns very smooth in that moment, and previous owner put in some really dense lube.
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=-=Canon eos 1100D=-=Zenit-E=-=
[RMC Tokina 35-105 macro FD][CZJ Sonnar 135mm f4 Exa][Jupiter-11 135mm f4 (silver)M39][Helios 44m-6][Helios-44-2 2/58][Vega-11u m39][Industar-50u][Tair-3fs][Mir-1B 2,8/37 (ВОЗМ)] |
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Basilisk
Joined: 21 Mar 2013
Posts: 356
Location: UK
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| Posted: Tue Jan 28, 2014 3:41 pm Post subject: |
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Basilisk wrote:
aluminium tube would shrink, but by a fraction of a percent. Moving the glass closer to the body should actually have the opposite effect anyway.
The refractive index of both air and glass may vary with temperature, and pressure/density can affect refractive index of air. It looks like the maths is pretty complicated and I don't pretend to understand it. But the answer might be there somewhere! |
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Analog lex
Joined: 10 Nov 2013
Posts: 95
Location: East Europe
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| Posted: Tue Jan 28, 2014 4:07 pm Post subject: |
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Analog lex wrote:
| Basilisk wrote: |
aluminium tube would shrink, but by a fraction of a percent. Moving the glass closer to the body should actually have the opposite effect anyway.
The refractive index of both air and glass may vary with temperature, and pressure/density can affect refractive index of air. It looks like the maths is pretty complicated and I don't pretend to understand it. But the answer might be there somewhere! |
Physically its kinda fair...
But how people shoot photos even in -30-40C°? 
_________________
=-=Canon eos 1100D=-=Zenit-E=-=
[RMC Tokina 35-105 macro FD][CZJ Sonnar 135mm f4 Exa][Jupiter-11 135mm f4 (silver)M39][Helios 44m-6][Helios-44-2 2/58][Vega-11u m39][Industar-50u][Tair-3fs][Mir-1B 2,8/37 (ВОЗМ)] |
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Basilisk
Joined: 21 Mar 2013
Posts: 356
Location: UK
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| Posted: Tue Jan 28, 2014 5:13 pm Post subject: |
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Basilisk wrote:
| Analog lex wrote: |
Physically its kinda fair...
But how people shoot photos even in -30-40C°? |
Some lenses shoot past infinity, or can be adjusted.
Also check the lens on a warm day and make sure it really does reach infinity! Maybe the adjustment is wrong.
Mirror lenses are notoriously temperature sensitive, but refractive lenses usually less so. |
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Lloydy
Joined: 02 Sep 2009
Posts: 7794
Location: Ironbridge. UK.
Expire: 2022-01-01
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| Posted: Tue Jan 28, 2014 5:15 pm Post subject: |
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Lloydy wrote:
if you set the lens to infinity in the warm, and get infinity, try taping the lens ring in place with electrical insulation tape so it doesn't move and then try using it outside. If it doesn't get infinity then at least you know it's not a helicoid problem.
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Analog lex
Joined: 10 Nov 2013
Posts: 95
Location: East Europe
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| Posted: Tue Jan 28, 2014 6:05 pm Post subject: |
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Analog lex wrote:
| Basilisk wrote: |
| Analog lex wrote: |
Physically its kinda fair...
But how people shoot photos even in -30-40C°? |
Some lenses shoot past infinity, or can be adjusted.
Also check the lens on a warm day and make sure it really does reach infinity! Maybe the adjustment is wrong.
Mirror lenses are notoriously temperature sensitive, but refractive lenses usually less so. |
Indoor, in warm room, it reaches infinity as well.
_________________
=-=Canon eos 1100D=-=Zenit-E=-=
[RMC Tokina 35-105 macro FD][CZJ Sonnar 135mm f4 Exa][Jupiter-11 135mm f4 (silver)M39][Helios 44m-6][Helios-44-2 2/58][Vega-11u m39][Industar-50u][Tair-3fs][Mir-1B 2,8/37 (ВОЗМ)] |
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Analog lex
Joined: 10 Nov 2013
Posts: 95
Location: East Europe
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| Posted: Sat Feb 22, 2014 9:59 pm Post subject: |
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Analog lex wrote:
Sorry for not good tested information. After tests with other 135mm lens, and bigger zooming in lifeview, i found it IS focus problem.
Even focus ring placed not properly by previous owner(as i say before, previous owner have lubricate lens by himself, and maybe connected parts not as they be in the first place).
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=-=Canon eos 1100D=-=Zenit-E=-=
[RMC Tokina 35-105 macro FD][CZJ Sonnar 135mm f4 Exa][Jupiter-11 135mm f4 (silver)M39][Helios 44m-6][Helios-44-2 2/58][Vega-11u m39][Industar-50u][Tair-3fs][Mir-1B 2,8/37 (ВОЗМ)] |
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