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  1. #1
    Shorty Barlow's Avatar
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    Default Self-Centring Extension Tube Safety?



    Hello, I've just bought a 35mm Revelation Astro (GSO) self-centring extension tube.

    https://www.telescopehouse.com/revel...on-tube-2.html

    Does anyone use one of these? I'm interested how safe they are in my ST102 with 2" accessories. It seems to cope adequately during indoor trials but I'd like to hear about anyone else's experiences with these.

    I had pictures but as I can't upload them I've put them here: https://www.cloudynights.com/topic/6...ube/?p=9009217

    Thanks.
    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

  2. #2
    Bigzmey's Avatar
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    Default Re: Self-Centring Extension Tube Safety?

    I would definitely engage the security screw.
    Scopes: Celestron: 8" SCT F10, Omni 150R Achro F5, Onyx 80ED F6.3; ES: 127mm CF F7.5 APO; Meade: ST80 F5. Mounts: ES Twilight I, Bresser EXOS2, SW SkyTee2, UA MicroStar. Binos: Orion 15x70, 10x50, Nikon 8x40. EPs: TeleVue: Delites, Plossls & barlows; ES: 82os & 68os; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV; Meade: UWAs & Plossls; Gary Russell: SP 56mm; BST: Flat Field. Filters: Astronomik: UHC; Lumicon: OIII, H-beta, DeepSky; Baader: UHC-S, M&SG, CB; Orion: UltraBlock, SG. DSO tally: 1119 (H400-1: 400, H400-2: 244, H300-3: 84; M110: 110, S110: 73). Doubles: 772, Comets: 11, Asteroids: 59
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  3. #3
    Shorty Barlow's Avatar
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    Default Re: Self-Centring Extension Tube Safety?

    Quote Originally Posted by Bigzmey View Post
    I would definitely engage the security screw.
    Yeah, that's a given lol.
    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

  4. #4
    Shorty Barlow's Avatar
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    Default Re: Self-Centring Extension Tube Safety?

    After some experimentation I've decided to return to a conventional 35mm extension tube. The self-centring extension works relatively well but is awkward with my particular disability. Furthermore, the safety screw tended to collide with the Baader adapter.
    TS Optics: 150mm, f/6 Newtonian (GSO SVD series). Altair: Starwave 102ED-R. Sky-Watcher: SkyMax 102mm, SkyMax 127mm, Evostar 72ED DS Pro, Evostar 80ED DS Pro, ST80 (TS Focuser), ST102 (TS Focuser), EQ5 Deluxe, AZ5 Deluxe. Vixen: Porta II, SXG Hal-130. Orion: 90mm StarMax , ST80 (TS Focuser). Celestron: NexStar Evolution 9.25". William Optics: E-BINO-P Binoviewer. A shed load of eyepieces including: Antares, Astro Hutech, Baader, Bresser, BST, Bushnell, Celestron, Explore Scientific, GSO, Kokusai, Meade, Orion, Sky-Watcher, Solomark, SvBony, TeleVue, Vixen & one or two I'm not sure of.

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