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  #1  
Old 30-03-2016, 07:35 PM
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MortonH
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Help me take this eyepiece apart

I have a nice 12.5mm ortho with illuminated reticle but there is a fair bit of hazing on the inside of the bottom element. I want to take it apart to see if it can be cleaned but I've been unable to unscrew it.

I seem to need some kind of two-pronged device to fit the tiny holes on either side. I tried two small screwdrivers but it felt like they'd break before the ring would unscrew.

Does anyone know what device I need and how to get one?

For everyone's information I have no need for this eyepiece so I'll be selling it in due course. Ideally I'd like to sell it as a clean working model but if not it'll be sold as is. Note that it comes with 4 spare batteries worth about $9 each.
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  #2  
Old 30-03-2016, 07:45 PM
Kunama
...

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Morton, Goggle up 'pin wrench' for lots of examples of the tool.

you can make your own by drilling 2 holes of the correct diameter and a bit smaller into some flat bar and then inserting the drill bits back to front into the holes,
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  #3  
Old 30-03-2016, 08:16 PM
raymo
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Hi Morton, a pair of pointed nose pliers stuck into the holes should do the trick; they'll give you plenty of leverage.
raymo
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  #4  
Old 30-03-2016, 08:19 PM
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MortonH
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Thanks guys!
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  #5  
Old 30-03-2016, 09:23 PM
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omegacrux (David)
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My local electronic shop sells watch case openers , 2 prong adjustable width

David
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  #6  
Old 30-03-2016, 09:32 PM
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MortonH
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Quote:
Originally Posted by omegacrux View Post
My local electronic shop sells watch case openers , 2 prong adjustable width

David
Is this something Dick Smith might sell?
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  #7  
Old 30-03-2016, 10:02 PM
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omegacrux (David)
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Might be , can't think of the name of the shop because it in the corner of my local video store , the item is in with the engravers and soldering iron area
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  #8  
Old 30-03-2016, 10:09 PM
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omegacrux (David)
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Leading Edge electronics , found the name

David
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  #9  
Old 30-03-2016, 10:10 PM
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MortonH
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Thanks David.
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  #10  
Old 30-03-2016, 10:57 PM
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peter_4059 (Peter)
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How about one of these:
http://www.jaycar.com.au/Tools-%26-S...PENER/p/TH1929

or the ebay variety:
http://www.ebay.com.au/itm/like/2620...pid=107&chn=ps
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  #11  
Old 30-03-2016, 11:02 PM
sharptrack2 (Kevin)
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I picked up one of these...

And one of these...

http://www.ebay.com.au/itm/361080905...%3AMEBIDX%3AIT

Both have worked well for eye pieces and camera lenses.
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  #12  
Old 31-03-2016, 05:07 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by sharptrack2 View Post
I picked up one of these...



And one of these...

http://www.ebay.com.au/itm/361080905...%3AMEBIDX%3AIT

Both have worked well for eye pieces and camera lenses.
I have one of these and it's an excellent tool. However, unless you have offset pins for it, I don't think you can get the arms close enough together to fit the tiny retaining ring used on the field lens of an orthoscopic.

I am away at the moment so unfortunately I can't check for you.

Cheers
John B
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  #13  
Old 31-03-2016, 06:00 PM
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killswitch (Edison)
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I use circlip pliers for those types of screws.
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