Help me take this eyepiece apart

[MortonH]

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.

[Kunama]

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,

[raymo]

Hi Morton, a pair of pointed nose pliers stuck into the holes should do the trick; they'll give you plenty of leverage.
raymo

[MortonH]

Thanks guys!

[omegacrux]

My local electronic shop sells watch case openers , 2 prong adjustable width

David

[MortonH]

Is this something Dick Smith might sell?

[omegacrux]

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

[omegacrux]

Leading Edge electronics , found the name

David

[MortonH]

Thanks David.

[peter_4059]

How about one of these:
http://www.jaycar.com.au/Tools-%26-Soldering/Hand-Tools/Other-Hand-Tools/TOOL-SET-TWO-PIECE-WATCH-CASE-OPENER/p/TH1929

or the ebay variety:
http://www.ebay.com.au/itm/like/262001850823?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=107&chn=ps

[sharptrack2]

I picked up one of these...



And one of these...

http://www.ebay.com.au/itm/361080905218?_trksid=p2057872.m2749 .l2649&ssPageName=STRK%3AMEBIDX%3AIT

Both have worked well for eye pieces and camera lenses.

[ausastronomer]

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

[killswitch]

I use circlip pliers for those types of screws.