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Thread: GSO Cassegrains

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    Default GSO Cassegrains



    https://agenaastro.com/gso-6in-f12-c...ector-ota.html

    I would use my Intes MK66 more if it weren't for dew. Here's an alternative. Except now I am moving to less dewy areas.
    DeanD, SpyderwerX, sketrip and 4 others like this.
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

  2. The Following 4 Users Say Thank You to not_Fritz_Argelander For This Useful Post:

    Bigzmey (01-12-2019),Gabby76 (01-11-2019),helicon64 (01-11-2019),ic_1101 (01-12-2019)

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    Default Re: GSO Cassegrains

    Very nice, and a really good price.
    Hopefully they will be a good alternative to the Vixen that are being phased out.
    Refractors: Antares 105 f/15, Bresser 102XL f/13.2, Celestron 102 f/6.5, 2-150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, Vixen SD115s f/7.7
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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

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    Default Re: GSO Cassegrains



    Quote Originally Posted by Gabby76 View Post
    Very nice, and a really good price.
    Hopefully they will be a good alternative to the Vixen that are being phased out.
    What Vixens are being phased out?!! The VMCs??
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

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    Default Re: GSO Cassegrains

    That would be so nice for quicker thermal acclimation and dew. I'm definitely interested.
    ~Frankie~ My mind: Always on...Slightly off.
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    Default Re: GSO Cassegrains

    Me too. But more for the 8". Right now Ive and aperture gap between 6 and 12 inches.
    Last edited by not_Fritz_Argelander; 01-11-2019 at 10:09 PM.
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    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

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    Default Re: GSO Cassegrains

    The 8" indeed. I do like the fixed primary design. The price point is good considering the included 2 speed Crayford, which is usually an additional expense for me on a standard Mak, as I prefer them.
    ~Frankie~ My mind: Always on...Slightly off.
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    Celestron CPC1100 SCT....Edge HD 8" + AVX...
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    180 Mak or SkyWatcher ST150
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    EPs: TeleVue (NJ) Plossls: 7.4--55... Various TeleVue Naglers: + 3-6 zoom...TeleVue (NJ) Widefields...volcano top (T) Orthos & Kellners...Leitz Periplans...TeleVue, Astronomik, Lumicon & Baader filters..

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    Default Re: GSO Cassegrains

    Coma corrector might be necessary...

    https://www.telescope-optics.net/len...r_examples.htm

    I have this vague memory that a Newtonian corrector would work on a Cassegrain. I found no confirmation here. I'll keep looking. This could be a very inexpensive way of getting performance equivalent to an Edge HD.
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

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    Default Re: GSO Cassegrains

    Interesting telescope not_Fritz, and probably good for lunar and planetary work. I also checked out the 8" at $899 with a weight of 20 lbs. - fine for an AVX or Twilight II mount. Who knows, I may pick up one of these.
    Last edited by helicon64; 01-11-2019 at 11:43 PM.
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    Default Re: GSO Cassegrains

    Quote Originally Posted by helicon64 View Post
    Interesting telescope not_Fritz, and probably good for lunar and planetary work. I also checked out the 8" at $899 with a weight of 20 lbs. - fine for an AVX or Twilight II mount. Who knows, I may pick up one of these.
    Galaxies and planetary nebulae too. And you just know I'm going to play with 0.5x focal reducers!
    helicon64 and Gabby76 like this.
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

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    Default Re: GSO Cassegrains

    Quote Originally Posted by not_Fritz_Argelander View Post
    Coma corrector might be necessary...

    https://www.telescope-optics.net/len...r_examples.htm

    I have this vague memory that a Newtonian corrector would work on a Cassegrain. I found no confirmation here. I'll keep looking. This could be a very inexpensive way of getting performance equivalent to an Edge HD.
    Teleskop Service sells the same OTA and recommends a RC reducer https://www.teleskop-express.de/shop...es-ab-F-8.html
    SpyderwerX likes this.
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Mixed branded Masuyama/Astroplans Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

 

 
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