Eyepiece tightness question.
-
- Articles: 0
- Posts: 11
- Joined: Sun Feb 05, 2023 3:30 am
- 1
- Location: USA
- Status:
Offline
Eyepiece tightness question.
While trying to set up my Nextron 8i, I noticed that my diagonal, barlow, and eyepieces were all pretty loose fits. Tightening the little set screws moved each component off center a little bit, and a bit out of parallel in some cases. That made it hard to set up and collimate properly.
To be more specific, I was able to wrap a .03" shim around each accessory, and they fit much better, or at least it does not bug me so much that way.
Is it normal to have such a loose fit, and if so, is there a reason for it?
- Lady Fraktor
- Articles: 0
- Posts: 10035
- Joined: Mon Apr 29, 2019 9:14 pm
- 5
- Location: Slovakia
- Status:
Offline
Re: Eyepiece tightness question.
Manufacturing tolerances are not always as good as they should be either which is a problem.
I have a premium diagonal that I have to patiently work eyepieces into as the tolerances are to tight.
Getting eyepieces out is just as painful
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
The only culture I have is from yogurt
- Bigzmey Online
- Moderator
- Articles: 8
- Posts: 7754
- Joined: Sat May 11, 2019 7:55 pm
- 5
- Location: San Diego, CA USA
- Status:
Online
-
TSS Awards Badges
Re: Eyepiece tightness question.
The only way around is to upgrade the telescope visual back and diagonal to better quality which come with at least brass compression ring or better self-centering adaptor.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Delos, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.
Observing: DSOs: 3122 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2196, S110: 77). Doubles: 2461, Comets: 34, Asteroids: 261
- gregl
- Articles: 0
- Posts: 1097
- Joined: Fri Sep 06, 2019 2:30 am
- 4
- Location: California
- Status:
Offline
Re: Eyepiece tightness question.
-
- Articles: 0
- Posts: 11
- Joined: Sun Feb 05, 2023 3:30 am
- 1
- Location: USA
- Status:
Offline
Re: Eyepiece tightness question.
Worst case, I can keep some strips of .03 shim material in my kit. If I had a lot more time to waste, I might put an internal groove, brass compression ring, and additional screw on my existing diagonal. However, it is a stock Celestron, and probably ought to be upgraded anyway.
- gregl
- Articles: 0
- Posts: 1097
- Joined: Fri Sep 06, 2019 2:30 am
- 4
- Location: California
- Status:
Offline
Re: Eyepiece tightness question.
Create an account or sign in to join the discussion
You need to be a member in order to post a reply
Create an account
Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute