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Thread: Some Musings on Eyepiece Kit Origins

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    Default Some Musings on Eyepiece Kit Origins



    I’ve been thinking about eyepiece kits and their various reputations. A fair while ago I acquired a Celestron Eyeopener Kit and found the Plossls to be quite good, in fact I still use the kit 13mm (in a bino pair), 17mm and 32mm Plossls. I’m not sure what actually happened to the 6mm and 8mm Plossls but they’ll probably turn up somewhere lol.

    celestron eyeopener kit artwork.jpg

    Celestron - Eyepieces - 1.25in Eyepiece and Filter Kit


    It struck me that the eyepiece focal lengths, 2x Barlow and Wratten filter colours are virtually identical to the 1.25" Eyepiece & Filter Kit-A on the Barsta (BST) homepage. The only apparent differences are where the kit box itself has a slightly different foam interior and the eyepiece barrels appear to be smooth chromed brass on the Barsta site artwork (as opposed to aluminium with undercuts featured on the Celestron kit).

    barsta filter kit.jpg

    1.25" / 2" Eyepieces & Filter Kit

    The 1.25" Eyepiece & Filter Kit-A Wratten filters are identical in colour and number to the filters supplied with the Celestron eyepiece and filter Kit.


    barsta filter kit eyepieces.jpg


    I’m fairly sure Celestron and Sky-Watcher, both Synta, market rebadged Barsta Plossls (many ’Sky-Watcher‘ Plossls actually have no brand name on them). Barsta do now use aluminium draw tubes with undercuts on many of their products. So I feel fairly confident that the Celestron Eyeopener Kit has its ultimate origins at Barsta.


    IMG_20170605_143855.jpg


    I used my old Celestron 32mm (4.6mm exit pupil, 1, 50' TFOV) combined with an Astronomik UHC-E filter in my 130mm Newtonian to find Comet C/2015 V2 Johnson on Sunday morning. It's one of the few EP's I have that the UHC-E will thread into.


    StarryNightImage.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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    Bigzmey (06-05-2017)

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    Default Re: Some Musings on Eyepiece Kit Origins

    Good to know. The issues with most kits (including yours ) that you end up not using half of the accessories.

    Gratz on catching Comet C/2015 V2 Johnson. This is very rewarding target, which looks nice even in binos.

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    Default Re: Some Musings on Eyepiece Kit Origins

    I can't be totally certain about the origins of the Celestron kit but it looks very likely to be Barsta made. I don't think I've ever really used the Barlow that came with it. It's a perfectly good achromatic short Barlow though, virtually identical to the Omni.

    GSO Barsta Short Barlows.jpg

    You can see it above compared to the Omni and a TS Optics (GSO) 2.5x Barlow. The filters were OK but the threads were incompatible with many of the kit Plossls and I think the green filter didn't thread onto any of them!

    johnson2.jpg

    Thanks, I'd seen it a few days earlier when it was higher. With my disability it's very difficult to aim my Newtonian near the zenith so I used my ST80 earlier. But as C/2015 V2 was nearer Arcturus, which was lower in the west after a while, it became easier to view sitting at my EQ mounted 130mm Newtonian.

    johnson1.jpg
    Bigzmey likes this.
    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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