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Swift Skipper Dioptre Repair - HELP!

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Category: Other Optics
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Topic: Swift Skipper Dioptre Repair - HELP!
Posted By: riles
Subject: Swift Skipper Dioptre Repair - HELP!
Date Posted: November/15/2013 at 14:58
Hi everyone,
My first post, and as is so often the case, I need HELP! I have acquired a nice clean Swift Skipper 7 x 50 model 789 - its an earlyish one with the twist up rigid eyecups - same as Newport, Saratoga & Audubon of the period. All is good except the dioptre is loose - it floats about and although if enough downward  pressure is applied and you keep turning (it doesn`t stop in either direction!) adjustment is possible, you can`t tell  where you actually are. I`ve removed the eyepieces to confirm all this and have started searching for grub screws so I can dismantle and/or tighten the dioptre in the more or less correct position. But.........there are no screws visible anywhere on any surface or ledge....so how was this assembled originally - and how can it be dis-assembled?? 
I have compared this Skipper with a Newport, Saratoga and an Audubon; all four have what is a blind hole in the silver surface exposed when the eyecup is wound up - what on earth was this for? Both the Saratoga and Audubon have tiny screws just visible on the underside of the eyecup, but the Skipper & Newport don`t. Obviously there are manufacturing differences due to different factories - but it doesn`t help me!!

Any thoughts on what has happened and what to do to get the dioptre off and reset? Such a shame if it can`t be done as its a very clean instrument.
Thanks for reading.

riles



Replies:
Posted By: Bird Watcher
Date Posted: November/15/2013 at 17:49
Start by sending an email to Cory Suddarth.
http://www.suddarthoptical.com - www.suddarthoptical.com  &  mailto:Suddarthoptical@yahoo.com - Suddarthoptical@yahoo.com
 


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I prefer Porro prism binoculars especially those made in Japan. (i.e. Minox BD 10x44 BP) 8>)


Posted By: Klamath
Date Posted: November/16/2013 at 12:14
There is no one in the universe better with Swift Optics than Nicholas Crista of NRC optics.

http://nrcoptics.wordpress.com/ - http://nrcoptics.wordpress.com/

Actually the solution mat be pretty simple.  Can you post a picture of the diopter adjustment eye piece?  Oftentimes there will be a series of very small screws on the outer ring of that eye piece that can become loosened or lost.  A simple tightening may do the trick.

Too late I see you are in the UK.  It may be difficult to get those shipped over here and back.  Any good repair shop can likely do the deed for you.


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Steve
"Everything that can be counted does not necessarily count; everything that counts cannot necessarily be counted". William Bruce Cameron



Posted By: riles
Date Posted: November/18/2013 at 03:33
Thank you Bird Watcher and Klamath for repsonding. I`ll try to get a picture posted when I`ve found out how to, but still can`t find any sign of screws on the diopter! I will send E Mails to your recommended names and hope they can suggest something.


Posted By: tahqua
Date Posted: November/18/2013 at 10:51
An old pair of Bushnell binoculars had a similar problem. I found the screws beneath the eye cups.

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Doug


Posted By: riles
Date Posted: November/18/2013 at 12:03
Hi Tahqua,

The twist-up eyecups on these old Swifts are solid not rubber, and when 'elevated' there is no sign of any screw heads - I`ve used a magnifying glass! That is the frustrating thing, the job should be relatively simple, but how to strip the diopter down is beating me still.



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