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quidam
Joined: 28 Sep 2012
Posts: 223
Location: Belgium
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 Posted: Wed Dec 23, 2015 1:26 am Post subject: PK-Nex adapter |
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quidam wrote:
I have a couple of PK to Nex adapters, all cheap chinese stuff (a no brand and an Ulata), but they both wobble when connected to the lens. Does someone here has a good and affortable one that doesn't wobble? If so, which brand?
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Sony Nex 5 & 6, Sony A7II. |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Dec 23, 2015 2:41 am Post subject: |
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Attila wrote:
I have same issue with my Konica adapters, one forum member did suggest to me from cheap ones Ulata brand.
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Lightshow
Joined: 04 Nov 2011
Posts: 3666
Location: Calgary
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| Posted: Wed Dec 23, 2015 5:24 am Post subject: |
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Lightshow wrote:
If the mount surface is flat, then the issue is the "spring" that holds the lens to this surface is too loose, this link explains it quicker than it would take my to type it. 
http://www.pentaxforums.com/forums/136-pentax-q/213120-adapter-lens-loose-fit-fix.html
Just use caution, the brass "spring" is hardly a spring and can easily break.
I've had good luck with Fotodiox adapters.
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calvin83
Joined: 12 Apr 2009
Posts: 7583
Location: Hong Kong
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| Posted: Wed Dec 23, 2015 5:32 am Post subject: |
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calvin83 wrote:
Unless the adapter use a leaf-spring design, you may need to adjust the adapter from time to time to secure your lenses.
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Lightshow
Joined: 04 Nov 2011
Posts: 3666
Location: Calgary
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| Posted: Wed Dec 23, 2015 12:43 pm Post subject: |
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Lightshow wrote:
| calvin83 wrote: |
| Unless the adapter use a leaf-spring design, you may need to adjust the adapter from time to time to secure your lenses. |
I am assuming a cheap Chinese adapter doesn't use a leaf spring.
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quidam
Joined: 28 Sep 2012
Posts: 223
Location: Belgium
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| Posted: Wed Dec 23, 2015 1:41 pm Post subject: |
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quidam wrote:
These are the two adapters I was talking about. They have both a different spring. Is the left one a leaf-spring design?
I have a lot of adapters, but only the PK's have the wobble-problem.
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calvin83
Joined: 12 Apr 2009
Posts: 7583
Location: Hong Kong
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| Posted: Wed Dec 23, 2015 2:31 pm Post subject: |
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calvin83 wrote:
None of them use a leaf-spring design. Here is an example in leaf-spring design http://www.amazon.com/Fotodiox-Adapter-PK-NEX-E-mount-NEX-VG10/dp/B003Y302FI . The leaf-spring design can be a better or worse design depends on how it is implemented.
You should be able to get the lens mounted firmly if you make an adjustment on your adapter. My Ultra Leica R to NEX adapter works pretty well after I make the adjustment.
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hoanpham
Joined: 31 Jan 2011
Posts: 2575
Expire: 2015-01-18
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| Posted: Wed Dec 23, 2015 2:52 pm Post subject: |
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hoanpham wrote:
I have used a hard metal blade to expand the leafs a little bit to make the lens better fit.
You can unscrew the adapter to modify. It is easier. Just be careful about the screw holes when you mount it back: they are made of relatively 'soft' metal.
Anyway, you should consider that there are only 3 tiny screws to support your lens. I bought adapters with 4, or 5 or 6 screws if possible. |
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calvin83
Joined: 12 Apr 2009
Posts: 7583
Location: Hong Kong
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| Posted: Wed Dec 23, 2015 3:14 pm Post subject: |
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calvin83 wrote:
Three screws should be sufficient for most no-so-heavy lenses if the screws are durable and deep into the adapter.
If the adapters are not working fine after the adjustment, you could try the K&F Concept as they seems gained decent reputation recently Click here to see on Ebay or http://www.amazon.com/Concept-Adapter-Pentax-E-Mount-NEX-VG10/dp/B00LECYTL4/ .
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quidam
Joined: 28 Sep 2012
Posts: 223
Location: Belgium
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| Posted: Wed Dec 23, 2015 3:41 pm Post subject: |
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quidam wrote:
Thank you all for your help. I just ordered the Fotodiox on Amazon. I'll give it a try.
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quidam
Joined: 28 Sep 2012
Posts: 223
Location: Belgium
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| Posted: Wed Jan 06, 2016 10:57 am Post subject: |
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quidam wrote:
The Fotodiox adapter fits perfectly. No more wobbling. 
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calvin83
Joined: 12 Apr 2009
Posts: 7583
Location: Hong Kong
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| Posted: Wed Jan 06, 2016 11:34 am Post subject: |
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calvin83 wrote:
Good to hear it works fine. 
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https://www.instagram.com/_lens_fever/ |
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