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Thread: 9mm Williams Optics SWAN Disassembly

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    Default 9mm Williams Optics SWAN Disassembly



    s1.jpg

    I originally bought these as a bino pair.

    s2.jpg

    There are five lenses in four groups.

    s4.jpg

    An asymmetrical convex eye lens, a doublet, a concave undersided convex lens and a concave field lens with a flat upper surface.

    s3.jpg

    There are three spacers.

    s5.jpg

    Closer view of the doublet.

    s6.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: 9mm Williams Optics SWAN Disassembly

    Why ?

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    Default Re: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by JR1 View Post
    Why ?
    Why what?
    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: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Shorty Barlow View Post
    Why what?
    Errr why take it apart, for what reason.

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    Default Re: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by JR1 View Post
    Errr why take it apart, for what reason.
    Well, to be honest, I don't like it as an eyepiece. I originally bought them for my WO bino. David Knisely described the 9mm SWAN as the 'runt of the litter' once in a review. He was underwhelmed by it apparently. I thought they'd be OK in a bino. I was wrong. WO aren't being totally truthful about its eye relief and it lacks clarity, contrast, brightness and is difficult to clean IMO. Furthermore they are overpriced for what they are. I'm not sure who the OEM is but for what I paid for them they were definitely overpriced. Three years ago they were a disappointment for me and have been sitting in a corner gathering dust since then. So I thought I'd see what was inside. These are always described as Erfles and I was curious.

    IMG_20171112_143940.jpg

    The drawtubes haven't gone to waste though 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: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Shorty Barlow View Post
    Well, to be honest, I don't like it as an eyepiece. I originally bought them for my WO bino. David Knisely described the 9mm SWAN as the 'runt of the litter' once in a review. He was underwhelmed by it apparently. I thought they'd be OK in a bino. I was wrong. WO aren't being totally truthful about its eye relief and it lacks clarity, contrast, brightness and is difficult to clean IMO. Furthermore they are overpriced for what they are. I'm not sure who the OEM is but for what I paid for them they were definitely overpriced. Three years ago they were a disappointment for me and have been sitting in a corner gathering dust since then. So I thought I'd see what was inside. These are always described as Erfles and I was curious.

    IMG_20171112_143940.jpg

    The drawtubes haven't gone to waste though lol.
    I have a pair of these as well, and I generelly agree with the above statement. To enjoy the full FOV I have to fold the eyecup down. There are a lot of 'something,' which I think looks like floaters or the like, inside the eyepiece which I initially thought was dirt, but after cleaning them it was still there. It could be some sort of stray light or maybe damage to the lenses. And it's inside both of them. I cant really see it in the dark, unless it's the Moon I observe, so I do enjoy the views though. But I bought them used WITH the WO bino and WITH the original 20 mm pair for a very favourable price and I find that there is a reason why the guy sold them so cheap.

    Michael
    Last edited by Sputnik-Michael; 02-10-2018 at 03:53 PM. Reason: Additional info

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    Default Re: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Sputnik-Michael View Post
    I have a pair of these as well, and I generelly agree with the above statement. To enjoy the full FOV I have to fold the eyecup down. There are a lot of 'something,' which I think looks like floaters or the like, inside the eyepiece which I initially thought was dirt, but after cleaning them it was still there. It could be some sort of stray light or maybe damage to the lenses. And it's inside both of them. I cant really see it in the dark, unless it's the Moon I observe, so I do enjoy the views though. But I bought them used WITH the WO bino and WITH the original 20 mm pair for a very favourable price and I find that there is a reason why the guy sold them so cheap.

    Michael
    Yes, that's exactly the debris that I could see in mine. I think it's a contaminant that was probably introduced during assembly. As I bought mine for lunar viewing this was a bit of a problem.

    I eventually swapped them for these inexpensive 10mm SvBony 62° Aspherics.

    Attachment 172683

    I swapped the original drawtubes for some inverted chromed brass ones off some old Sky-Watcher MA's. They don't need filter threads for the bino.

    IMG_20170924_142011.jpg

    I can't remember what I paid for the SWAN's but the SvBony Aspherics weren't a quarter of the price. Plus they give very sharp, bright views.
    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: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by Shorty Barlow View Post
    An asymmetrical convex eye lens, a doublet, a concave undersided convex lens and a concave field lens with a flat upper surface.
    Sounds weird and unfortunate.
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    Default Re: 9mm Williams Optics SWAN Disassembly

    Quote Originally Posted by not_Fritz_Argelander View Post
    Sounds weird and unfortunate.
    Exactly. 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: 9mm Williams Optics SWAN Disassembly

    It even has a marketing video on YouTube lol.

    https://www.youtube.com/watch?v=C6C_-gp1GHU
    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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