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Thread: GSO Cassegrains

  1. #11
    Bigzmey's Avatar
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    Default Re: GSO Cassegrains



    Interesting. Considering central obstruction and spider vanes is this claim justified?

    "it’s ideal for crisp and razor-sharp visual observation and imaging. This telescope offers views that rival apochromatic refractors"
    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 15x70, 10x50, Celestron 8x42. EPs: TeleVue: Delites, Plossls & barlows; ES: 82os & 68os; Vixen: SLVs; Baader: BCOs & Aspherics; Meade: UWAs & Plossls; Celestron: X-Cel LXs; BST: Flat Field. Filters: Astronomik: UHC; Lumicon: OIII, H-beta, DeepSky; Baader: UHC-S, M&SG, CB; Orion: UltraBlock, SG. DSO tally: 1119 (H400-1: 400, H400-2: 244, H300-3: 84; M110: 110, S110: 73). Doubles: 720, Comets: 10, Asteroids: 49
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  2. #12
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    Default Re: GSO Cassegrains

    Quote Originally Posted by Bigzmey View Post
    Interesting. Considering central obstruction and spider vanes is this claim justified?

    "it’s ideal for crisp and razor-sharp visual observation and imaging. This telescope offers views that rival apochromatic refractors"
    Secondary obstruction is 33% according to the specs so that is significant.....
    Michael
    Obsession 18" f/4.2, Zhumell Z10 f/4.9, ES AR 152 refractor f/6.5, Celestron Skymaster 15x70's , Bushnell 10x50's
    9x50mm RACI finder, Telrad, Rigel Quickfinder, 30mm Erfle, 9mm Plossl, and full line of ES eyepieces
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  3. #13
    SpyderwerX's Avatar
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    Default Re: GSO Cassegrains

    Quote Originally Posted by not_Fritz_Argelander View Post
    Teleskop Service sells the same OTA and recommends a RC reducer https://www.teleskop-express.de/shop...es-ab-F-8.html
    I notice in that product description it states "works good with Celestron EHD...etc..." I wonder how similar it is to the dedicated EHD FR's. It's definitely a lot cheaper, even with exchange rate.
    ~Frankie~ My mind: Always on...Slightly off.
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    Atlas EQ-G (EQ6) +
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    180 Mak or SkyWatcher ST150
    OTA's: SkyWatcher Pro-ED 100...Orion ST80...Selsi 80mm f/15 frac
    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..

  4. #14
    Gabby76's Avatar
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    Default Re: GSO Cassegrains

    Quote Originally Posted by not_Fritz_Argelander View Post




    What Vixens are being phased out?!! The VMCs??
    Yes unfortunately, Vixen made the announcement in December that they would be phased out this year 2019. No replacement has been announced at this time.
    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
    Mounts: Manfrotto 028B/ 055PRO, Celestron SLT, Celestron CG-5/ Argo Navis, Stellarvue M2C, Vixen SXP Binoculars: Celestron Eyepieces: A-Z

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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)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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  5. #15
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    Default Re: GSO Cassegrains

    Quote Originally Posted by SpyderwerX View Post
    I notice in that product description it states "works good with Celestron EHD...etc..." I wonder how similar it is to the dedicated EHD FR's. It's definitely a lot cheaper, even with exchange rate.
    I suspect that I'll try the Astro Physics reducer first, since I already have it. About the same price.

    https://telescopes.net/store/astro-p...SABEgI1IfD_BwE
    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

  6. #16
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    Default Re: GSO Cassegrains

    Quote Originally Posted by Gabby76 View Post
    Yes unfortunately, Vixen made the announcement in December that they would be phased out this year 2019. No replacement has been announced at this time.
    I vaguely remember your telling me that before, sorry for being dotty.

    I’ve been following the pricing, noticing large swings on the 8” costs. Should have been less disciplined.
    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

  7. #17
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    Default Re: GSO Cassegrains

    I was looking at the VCM200 again so I need to either make up my mind, start planning on used or wait for reviews of these GSO offerings.
    A Intes MN or MC is still a possible option later on also.
    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
    Mounts: Manfrotto 028B/ 055PRO, Celestron SLT, Celestron CG-5/ Argo Navis, Stellarvue M2C, Vixen SXP Binoculars: Celestron Eyepieces: A-Z

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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)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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  8. #18
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    Default Re: GSO Cassegrains

    Quote Originally Posted by Gabby76 View Post
    I was looking at the VCM200 again so I need to either make up my mind, start planning on used or wait for reviews of these GSO offerings.
    A Intes MN or MC is still a possible option later on also.
    Intes is dead. Long live Intes Micro. Same opticians, less abuse of the workers.
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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

  9. #19
    Gabby76's Avatar
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    Default Re: GSO Cassegrains

    Even Intes Micro is in a bit of a slow down as most of the optical work has been turned over to military optics right now.
    Some things are getting scarce if it comes from Russia or Ukraine.
    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
    Mounts: Manfrotto 028B/ 055PRO, Celestron SLT, Celestron CG-5/ Argo Navis, Stellarvue M2C, Vixen SXP Binoculars: Celestron Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / 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)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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  10. #20
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    Default Re: GSO Cassegrains

    Quote Originally Posted by Gabby76 View Post
    Even Intes Micro is in a bit of a slow down as most of the optical work has been turned over to military optics right now.
    Some things are getting scarce if it comes from Russia or Ukraine.
    Yes. I’ve noticed a distressing decrease in the number of offerings. I (very much, is an understatement) prefer Rutten Maksutov designs to silver spot Maksutovs. The GSO offerings of Rutten Maks are good for AP but are lacking visually.

    An alternative to my making a Houghton Cassegrain is a Classic.
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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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