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  1. #1
    badlittleduck's Avatar
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    Default SE 6 collimation



    Hi
    I'm sort of new to astronomy but I do know enough to make me dangerous to my checkbook. But I am having an extremely difficult time getting my SE 6 to collimate properly. The screws don't turn very easily but I assume that is by design. But I am afraid to push to hold the screwdriver in the screw head. what worries me is there is a very expensive piece of glass on the front of the telescope. I bought Bob's Knobs to help take care of this issue but I can't for the life of me get the screws out so I can replace them. I have never had this problem in the past. My old newtonian the screws were snug but you could move them I am getting very frustrated with the SCT design. When it first arrived all was good. I was fully aware thet the day would come where it would need collimation but this seems hopeless. Any ideas short of WD40 or throwing a can of it at the SCT would be extremely appreciated.
    badblackduck

  2. #2
    UlteriorModem's Avatar
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    Default Re: SE 6 collimation

    Yuk! Whatever you do do NOT spray wd40 in there!

    Never mind I forgot it was a Cat..

    See pages 35 & 36

    https://s3.amazonaws.com/celestron-s...11069manua.pdf
    Last edited by UlteriorModem; 03-19-2018 at 09:49 PM.
    Scopes: Orion 130mm APO Triplet, Orion 8" f4 astrograph, 10" RC Mount: Celestron CGX-L Guiding: Orion 60mm f4 scope, Starlight Loadstar, PHD2 software - Cams: Planetary: ASI120mc, DSO:Atik 383L+, SGPsoftware Processing : Regisax, Deep Sky Stacker, Star Tools, Pixinsight Assistant: One very large cat
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  3. #3
    Wire's Avatar
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    Default Re: SE 6 collimation

    Does the scope need collimation.
    My Scopes: Celestron Nexstar 8se, w/RDF & Telrad
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  4. #4
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    Default Re: SE 6 collimation

    Is this a new or used scope?
    The screws should be fairly easy to loosen.

    To install Bobs Knobs, remove 1st screw and replace with Bobs knob thumb screw, then 2nd screw, then 3rd screw. Don't remove all 3 at once.

    Scott
    Celestron Classic 8, Old Sears 60mm f/15 refractor, Old Edmund Scientific 6 inch F/8 newt, GSO 2" Diag, ES 30mm/70, ES 25mm/70, Orion 32 Super Plossl, Mead 24mm MA,
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  5. #5
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    Default Re: SE 6 collimation

    Assuming you can ever get those screws loose enough to be useable, I suggest and recommend the use a Duncan mask to collimate your SCT. Here is a website giving directions. I use one and it works great and is so easy to use. I used an old pizza box top to construct mine. Make sure you use a bright star and a high powered EP when using the mask as the "Y" tends to be a bit small. It works exceptionally well when you use your guide camera (if you have one) instead of your eye.
    Schmitt-Cassegrain Collimation Made Easy Using a Duncan Mask | Alpha Lyrae
    Duncan method of SCT collimation..... | The Chicago Astronomer

    Cheers,
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  6. #6
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    Default Re: SE 6 collimation

    Do you really need collimation? SCTs are not like newts. They are more like refractors. Typically, you don't need to collimate them, unless you bash it really hard.

    So, the day you need collimation may never come. My 8" SCT is still spot on after 3 years riding on really bumpy dirt roads.
    Scopes: Celestron: 8" SCT F10, Omni 150R Achro F5, Onyx 80ED F6.3; ES: 127mm CF F7.5 APO. Mounts: ES Twilight I, Bresser EXOS2, SW SkyTee2, UA MicroStar. Binos: Orion 10x50, Celestron 8x42. EPs: TeleVue: Plossls & barlows; ES: 82os & 68os; Vixen: SLVs & NPLs; Baader: BCOs & Aspherics; EO/UO: HD Orthos; Meade: UWAs & Plossls; Celestron: X-Cel LXs, Luminos; GSO SVs. Filters: Astronomik: UHC; Lumicon: OIII, H-beta, DeepSky; Baader: UHC-S, M&SG, CB; Orion: UltraBlock, SG. DSO tally: 936 (H400-1: 400, H400-2: 152, H300-3: 27; M110: 110, S110: 73). Doubles: 600, Comets: 6, Asteroids: 30
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