Scott K
Carpal Tunnel
Reged: 09/13/07
Posts: 1531
Loc: Dallas, TX & Eufaula, OK
|
|
I attached my 2" OIII filter to my Nagler 31mm eyepiece tonight. However, when I tried to remove the filter, I find that I can only get it about half way off of the threads on the eyepiece.
I'd prefer to remove it without damaging either the filter or the eyepiece, but if I have to choose, the filter is expendable.
|
helpwanted
Carpal Tunnel
Reged: 07/04/07
Posts: 2877
Loc: Phoenix, AZ
|
|
was it cold outside? if so, wait, let it cool back to room temp before trying anything.
--------------------
|
John J
sage
Reged: 11/05/07
Posts: 326
Loc: Sioux Falls SD
|
|
Try to see if it will screw back in. Then unscrew it again. Repeat until it works free. Sounds like the aluminum threads on the filter are galled. Inspect the filter threads for build up. If it is bad the filter threads need to be cleaned up with a xacto knife. If that doesn't work buy a cheap Moon filter and swap the filter into the new thread casing.
JJ
--------------------
Things are looking up!
http://inskysd.org/gallery/
My Flicker Astro Site
|
NoiseJammer
sage
Reged: 09/16/07
Posts: 235
Loc: Gone walkabout
|
|
Sometimes a camera filter wrench will let you get a grip on the filter without deforming it - these cost a couple of bucks and work like a charm.
Bruce, Toronto
--------------------
178 square inches of mostly shiny glass, one biph
... and way, way too much light polution.
|
Jim Curry
professor emeritus
Reged: 10/29/07
Posts: 527
Loc: Maine
|
|
Wrap a belt around the unit squeezing at the filter end and give it a turn.
Jim
--------------------
Vixen 140 refractor
|
arpruss
scholastic sledgehammer
Reged: 05/23/08
Posts: 962
Loc: Waco, TX
|
|
Or maybe put a rubber band around the filter for better grip?
--------------------
Coulter Odyssey 13.1" split-tube
Coulter Odyssey 8"
Home-made 7.8" F/4 dobsonian travel scope
Home-made 68mm F/5.3 achro (typically used as finder on 13.1")
Skymaster 15x70
BPTs4 8x30
32mm Plossl, 30mm GSO SV, 30mm Rini, 27mm Kellner, 13mm Hyperion, 6mm TMB/BO Planetary, Owl 2X Barlow
Palm TX with AstroInfo and RescoViewer
|
csa/montana
Den Mother
Reged: 05/14/05
Posts: 43984
Loc: montana
|
|
I have a jar opener, that's rubber coated; has a large & small size opening. This works slick for removing just about anything, without damage.
--------------------
Carol
AstroTech 16" Dob (Thanks ASTRONOMICS!)
Vixen 80MF/AstroTech Voyager
Masuyama's 7.5, 15, 25W, 35mm,
Pentaxes; 5XW, 7XL, 10XW.
14mm Meade 4000 UWA
TV Panoptics; 22, 35
DreamCatcher Dobservatory
|
Arbacia
scholastic sledgehammer
Reged: 04/18/07
Posts: 788
Loc: Madrid, Spain
|
|
Use a computer mouse pad, a soft neoprene one, not the glossy pads. On a table, press the barrel of the ocular against the mat strong enough and turn the EP. The filter will be unscrew.
I have been using this tip for photo camera filters for years.
Patricio
--------------------
LightBridge 12", 70īs C8, C11. CGE. ETX125
Set of Takahashi LE EPs; Ethos; DMK 31AF03.AS
CN image gallery
http://www.astrohenares.org
http://www.asociacionhubble.org
|
starrancher
Pooh-Bah
Reged: 06/09/09
Posts: 1304
Loc: Northern Arizona
|
|
The rubber band thing worked for me just the other day on an eyepiece barrel I wanted off . I was 'bout ready to put the thing in the shop vise !  I'm glad the rubber bands worked .
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
|
johnnyha
Carpal Tunnel
Reged: 11/12/06
Posts: 1539
Loc: Sherman Oaks, CA
|
|
Knock the EP against a table a few times. If that doesn't work you can put it in a vise, set a chisel into the side of the filter at an angle and give it one quick sharp blow with a hammer. If you stick it in a washing machine it is likely to come off as well. If worse comes to worst you can stick it under your rear tire and back over it, it'll pop right off.
Seriously I like the rubber band idea BTW, thanks!
--------------------
Johnny
Spicewood, TX
Sherman Oaks, CA
|
starrancher
Pooh-Bah
Reged: 06/09/09
Posts: 1304
Loc: Northern Arizona
|
|
Quote:
Knock the EP against a table a few times. If that doesn't work you can put it in a vise, set a chisel into the side of the filter at an angle and give it one quick sharp blow with a hammer. If you stick it in a washing machine it is likely to come off as well. If worse comes to worst you can stick it under your rear tire and back over it, it'll pop right off.
I like the rubber band idea BTW, thanks!
Heeeeeere's JOHNNY !
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
Edited by starrancher (11/19/09 01:49 PM)
|
johnnyha
Carpal Tunnel
Reged: 11/12/06
Posts: 1539
Loc: Sherman Oaks, CA
|
|
Quote:
Heeeeeere's JOHNNY !
I just think the Nagler 31T5 is a lot more solid than people think. If you smashed a Timex watch with a 31 Nagler guess which one would still keep ticking? Just this last summer I built a dog house with a Nag 31T5 when i couldn't find my good hammer.
--------------------
Johnny
Spicewood, TX
Sherman Oaks, CA
|
starrancher
Pooh-Bah
Reged: 06/09/09
Posts: 1304
Loc: Northern Arizona
|
|
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
|
Lane
Carpal Tunnel
Reged: 11/19/07
Posts: 1682
Loc: Frisco, Texas
|
|
Quote:
Quote:
Heeeeeere's JOHNNY !
I just think the Nagler 31T5 is a lot more solid than people think. If you smashed a Timex watch with a 31 Nagler guess which one would still keep ticking? Just this last summer I built a dog house with a Nag 31T5 when i couldn't find my good hammer.
If your Nagler 31mm starts ticking then you need to throw as far as you can, because you have made the easy and understandable mistake of confusing it with a hand grenade.
--------------------
Mounts: CGEM, ORION SIRIUS, AT Voyager/jmi motorized
SCTs: C6, C8, C9.25, C11,
Refractors: TV Pronto, Orion ED80, AT106
|
johnnyha
Carpal Tunnel
Reged: 11/12/06
Posts: 1539
Loc: Sherman Oaks, CA
|
|
--------------------
Johnny
Spicewood, TX
Sherman Oaks, CA
|
ausastronomer
scholastic sledgehammer
Reged: 06/30/03
Posts: 944
Loc: NSW Central Coast (Australia)
|
|
I have a camera filter that "binds" all the time. I found a plastic "cable tie" put on so that the filter unscrews as the cable tie tightens, works perfectly. I carry 4 or 5 cable ties in my camera accesory case for this very purpose. The plastic cable tie doesn't damage anything and applies infinitely more undo force than you can apply with bare fingers
Cheers,
--------------------
John Bambury
AS of NSW
AS of Hunter Valley
18"/F4.5 Obsession fully loaded with OMI optics
14"/F4.5 SDM fully loaded with Zambuto Optics
10"/F5 Newtonian with Argo Navis
Lots of Pentax XW's. 12mm & 17mm Nagler T4's, 31mm Nagler T5 & 13mm ETHOS. TV Paracorr and 1.8X TV Barlow and 2.5X TV Powermate
|
HfxObserver
scholastic sledgehammer
Reged: 11/12/04
Posts: 872
Loc: Regina, SK, Canada
|
|
Send it to me, I can get it off and send the filter back 
--------------------
Chris
7X50 Vixen,22X100 Antares
80mm William Optics Megrez II ED
Santel MK6
Borg 125SD f6 (Pentax/Oasis version)
Tak-Lapides
Pentax XW's 40,20,14,10,3.5, 5mm XO,3.8XP, Speers 5-8, 30mm Widescan III
|
Scott K
Carpal Tunnel
Reged: 09/13/07
Posts: 1531
Loc: Dallas, TX & Eufaula, OK
|
|
Followup:
I got them apart today. I had to remove the lower part of the eyepiece barrel from the 31mm, and use a pair of rubber jar opener pads to have enough torque to get the filter off. Between working it back and forth as suggested, and well, forcing it, I got it.
The threads on the filter are just trashed - they are gone on one side of the filter. The threads on the eyepiece barrel are in better shape, although I may need to send it back to TV for repair. (I tried cleaning them up with an xacto knife, as suggested - that helped a LOT.) We'll see how it goes.
I'm definitely going to try to sacrifice a moon filter to replace the body of the 2" OIII filter.
Thanks for the advice all! Now if only the shutter on my observatory hadn't broken the same day so that I could enjoy the nice clear night we're going to have this evening!
(That is a story for a different thread!)
|
csa/montana
Den Mother
Reged: 05/14/05
Posts: 43984
Loc: montana
|
|
Scott; sorry about that! What brand was the filter? I know I've had problems with Orion's screwing into my eyepieces.
Sure hope the threads on your eyepiece are still usable 
--------------------
Carol
AstroTech 16" Dob (Thanks ASTRONOMICS!)
Vixen 80MF/AstroTech Voyager
Masuyama's 7.5, 15, 25W, 35mm,
Pentaxes; 5XW, 7XL, 10XW.
14mm Meade 4000 UWA
TV Panoptics; 22, 35
DreamCatcher Dobservatory
|
Scott K
Carpal Tunnel
Reged: 09/13/07
Posts: 1531
Loc: Dallas, TX & Eufaula, OK
|
|
Hi Carol. It was a lumicon 2" OIII. Good filter, it's worked flawlessly for several years. This was not the worst thing that happened do me that night. My mirror diagonal also fell in half while I was using it. (That was fixable, fortunately.)
I need to post a thread over in the obs. forum - I think I'm cursed, because neither of those things were the worst thing that happened!
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 