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uddhava
Joined: 22 Aug 2012
Posts: 3073
Location: Hungary
Expire: 2021-06-21
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 Posted: Sun Nov 29, 2015 3:55 pm Post subject: Yashinon DX 2/50mm stuck focus |
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uddhava wrote:
I was out shooting with the above lens and the focus ring froze up. Thought it might be
because of the cold but later and warmer it is still firmly stuck. 
Any suggestions or links?
Thank you. |
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uddhava
Joined: 22 Aug 2012
Posts: 3073
Location: Hungary
Expire: 2021-06-21
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| Posted: Mon Nov 30, 2015 3:58 pm Post subject: |
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uddhava wrote:
I fixed it. One of the screws that fastens the focusing ring to the outer part of the helicoid was loose and
came out, causing it to jam up.
Still slightly stiff which causes it to unscrew from the M42 to EOS adapter.
Perhaps that is due to the cold weather? |
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Nordentro
Joined: 24 Jun 2010
Posts: 4713
Location: Lillehammer, Norway
Expire: 2015-01-29
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| Posted: Mon Nov 30, 2015 4:19 pm Post subject: |
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Nordentro wrote:
I have several lenses too, which is "summer only" lenses 
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Lars | Manuellfokus.no |
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uddhava
Joined: 22 Aug 2012
Posts: 3073
Location: Hungary
Expire: 2021-06-21
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| Posted: Mon Nov 30, 2015 4:28 pm Post subject: |
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uddhava wrote:
| Nordentro wrote: |
| I have several lenses too, which is "summer only" lenses |
I guess that is due to the grease being used? |
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Nordentro
Joined: 24 Jun 2010
Posts: 4713
Location: Lillehammer, Norway
Expire: 2015-01-29
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| Posted: Mon Nov 30, 2015 6:23 pm Post subject: |
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Nordentro wrote:
Some lenses feels alot slower during cold weather. Many old German and Soviet lenses seems to get stiffer... Japanese lenses are better in general IMO
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Lars | Manuellfokus.no |
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tomasg
Joined: 01 Nov 2009
Posts: 1135
Expire: 2014-04-28
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| Posted: Mon Nov 30, 2015 7:26 pm Post subject: |
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tomasg wrote:
| uddhava wrote: |
| Nordentro wrote: |
| I have several lenses too, which is "summer only" lenses |
I guess that is due to the grease being used? |
Yes, some grease in not "stable" at different temperatures add to that it s age and the result is stiffer rings with cold. |
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rock
Joined: 03 Jun 2017
Posts: 7
Location: san diego, Ca
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| Posted: Sat Jun 03, 2017 11:56 pm Post subject: similar problem here |
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rock wrote:
I have the yashinon 5cm ( not 50mm ) version f2 built in 1961 and have the same problem. This type of yashica lens are notoriuosly hits the flanges at the throat of camera body and/or even the reflex lens when they try to focus at infinity because they retracts further than many other lens. It is a combination of bad adapter and particular lens. NOT all M42 are built the same. I am currently looking for a type of adapters that allow this lens adapts at infinity.
PS I shoot Panasonic GH4 is a m43 system, there is no reflex lens. My dilemna is the FAR END ( not the CLOSE END where the body attaches to the adapter)where the lens attaches to the Fotodiox adapter. This adapter has a ridge like a flange built in and blocks the lens retraction while attempting to focus at infinity.
Anybody has a good experience with M42 to M43 adapters with this lens please let me know. Thank you.
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