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Thread: 20mm Williams Optics SWAN Disassembly

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    Default 20mm Williams Optics SWAN Disassembly



    Below: 66°, 5 element, 20mm William Optics SWAN eyepiece.

    WO1.jpg

    My 20mm SWAN was supplied as part of a bino pair with my WO binoviewer.

    WO2.jpg

    I’m pretty sure these are usually marketed as 72° AFOV but the WO bino can only effectively use 66°.

    WO3.jpg

    Elements with eye lens at top.

    WO4.jpg

    These seem to be two singlets and a triplet.

    WO5.jpg

    Closer views of the triplet.

    WO6.jpg
    WO7.jpg
    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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    Default Re: 20mm Williams Optics SWAN Disassembly

    You're on a roll. What's next?
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Don Alvarez View Post
    You're on a roll. What's next?
    I really want to explode my 9mm WO SWAN. 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.

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    Default Re: 20mm Williams Optics SWAN Disassembly

    I think you should combine all the ones you've dissected so far to make one mega eyepiece.
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Don Alvarez View Post
    I think you should combine all the ones you've dissected so far to make one mega eyepiece.
    Yeah, brilliant idea 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.

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    Default Re: 20mm Williams Optics SWAN Disassembly

    Thanks for the dissection. I have enjoyed your many lab experiments. I had a complete set of the SWANs at one point. The longer focal length 2" 25, 33 & 40 were decent in a longer FL scope, but the shorter focal lengths definitely left a lot to be desired.
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Hmm, 70 deg Erfle should be 2-1-2. Sounds like another modified Konig. It could be that the companies use Konig in shorter focal lengths (1.25") and switch to Erfle at 2" for these SWA lines?

    Can you measure field stop on this one?


    You are on a roll! Let's do TV Ethos next.
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Bigzmey View Post
    You are on a roll! Let's do TV Ethos next.
    No need. JG has posted a link to an X-ray study of the Ethos.
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Bigzmey View Post
    You are on a roll! Let's do TV Ethos next.
    Oh, I gotta see this.
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    Default Re: 20mm Williams Optics SWAN Disassembly

    Quote Originally Posted by SpyderwerX View Post
    Oh, I gotta see this.
    It's already been posted here
    Explore Scientific 14mm Ethos 13mm English

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