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invisible
Joined: 06 Jun 2013
Posts: 343
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 Posted: Thu Jun 18, 2015 10:07 pm Post subject: Help removing this adapter (or tube), and identifying it too |
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invisible wrote:
Hello all,
Today I received a Cosina 24/2.8 lens in Nikon mount that I had found on ebay. The photos of the listing showed some sort of adapter (or tube) mounted on the lens, which I figured I'd remove when the lens arrived so I could enjoy the lens on my D700. Problem is, I can't remove this gizmo, and I don't want to force things and end up damaging any of the rings in the process.
There are no markings or release button on the gizmo.
Any ideas what this adapter/tube could be? Any suggestions regarding removal?
Thanks in advance.
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Thu Jun 18, 2015 11:15 pm Post subject: |
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luisalegria wrote:
Possibly an adapter for a video system or something like that, with a short register hence a fairly long tube is needed for this SLR lens.
I suspect the locking mechanism is something you can see from the rear, as you are showing. I see some little slots there, maybe for a spanner.
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20Bbl
Joined: 15 Jan 2015
Posts: 30
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| Posted: Fri Jun 19, 2015 5:04 am Post subject: |
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20Bbl wrote:
Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
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Pancolart
Joined: 04 Feb 2008
Posts: 3693
Location: Slovenia, EU
Expire: 2013-11-18
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| Posted: Fri Jun 19, 2015 4:01 pm Post subject: |
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Pancolart wrote:
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
+1 
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
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| Posted: Fri Jun 19, 2015 4:53 pm Post subject: |
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exaklaus wrote:
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
Not sure, if that will work as I can see the lens' bayonet free from any engagement
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Lightshow
Joined: 04 Nov 2011
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Location: Calgary
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| Posted: Fri Jun 19, 2015 7:17 pm Post subject: |
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Lightshow wrote:
Need more pictures from the inside, there may be a lever that is engaged into the locking pin spot on the lens.
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20Bbl
Joined: 15 Jan 2015
Posts: 30
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| Posted: Fri Jun 19, 2015 7:45 pm Post subject: |
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20Bbl wrote:
| exaklaus wrote: |
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
Not sure, if that will work as I can see the lens' bayonet free from any engagement |
You may be right, in that case the last owner probably slipped the extension tube (intermediary one?) over the mount itself and somehow got stuck?. A vertical pull with a "wiggle" will probably help? . I'm sure he figured it out already  . |
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invisible
Joined: 06 Jun 2013
Posts: 343
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| Posted: Fri Jun 19, 2015 8:32 pm Post subject: |
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invisible wrote:
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
Turning clockwise did the trick, thank you! I'm a happy camper right now!
That being said, one side of the extension tube mounts on the Nikon Ai lens. And the other? It's a screw mount, about 59mm (2.3 inches) in diameter.
Thank you everybody for your help, by the way!! |
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20Bbl
Joined: 15 Jan 2015
Posts: 30
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| Posted: Sat Jun 20, 2015 7:58 am Post subject: |
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20Bbl wrote:
| invisible wrote: |
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
Turning clockwise did the trick, thank you! I'm a happy camper right now!
That being said, one side of the extension tube mounts on the Nikon Ai lens. And the other? It's a screw mount, about 59mm (2.3 inches) in diameter.
Thank you everybody for your help, by the way!! |
Good news, glad it helped. About the extension tube it look like it has been forced in place, you can try the "freezer" trick to remove it, put it 20min or so in your freezer, take it out and pull vertically on the tube. You can also try with some hot water.
Good luck. |
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invisible
Joined: 06 Jun 2013
Posts: 343
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| Posted: Sun Jun 21, 2015 1:17 am Post subject: |
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invisible wrote:
| 20Bbl wrote: |
| invisible wrote: |
| 20Bbl wrote: |
| Look like a classic "macro" extension tube to me, just turn it clockwise! (not counter clockwise) it's an AI-s adapter. |
Turning clockwise did the trick, thank you! I'm a happy camper right now!
That being said, one side of the extension tube mounts on the Nikon Ai lens. And the other? It's a screw mount, about 59mm (2.3 inches) in diameter.
Thank you everybody for your help, by the way!! |
Good news, glad it helped. About the extension tube it look like it has been forced in place, you can try the "freezer" trick to remove it, put it 20min or so in your freezer, take it out and pull vertically on the tube. You can also try with some hot water.
Good luck. |
Haha, what a neat trick I'll keep it in mind for future reference. |
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