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  1. #1
    Thermodynamics's Avatar
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    Default Question about building an equatorial platform



    I hope this is the correct forum to pose this question in, if not I trust that the Mods will move it to where it belongs (and I of course apologize in advance).

    I have decided that I need to take photos with my scope. I have this big 10" Behemoth sitting here that can capture lots of light and I am only looking through the thing. I feel like I am only using it for half of what it can do. My problem is that it is a Dob, so it can't track.

    I could either buy another scope (I'd love an 8" Celestron SE), but I think Mrs. Thermodynamics would not care so much for that option. I could save myself a lot of the swearing and blood loss that comes with most of my do-it-yourself projects and just buy an equatorial platform, but a fully built model costs almost as much as the Celestron scope that tempts me. Or I could build one myself.

    I sort of have a visual image of how one of these platforms work (in concept). I still don't have my head around many of the finer details, but I think (hope) I should be able to work those out as I go. The one thing that concerns me is the motor, I have never done anything with a motor before and I have no idea what type to get much less what to do with it when I do get it. I have no clue how to make the motor move at the rate I will need it to.

    I want to use the most simple design out there with the least number of components possible to limit my opportunity for error.

    If anyone has any advice, suggestions, links et cetera...you have no idea how welcome they would be at this point. Many thanks in advance!
    OTAs - Celestron C8 SCT, Clestron C6 SCT, Celestron 102mm MCT, Orion ST-80a, Explore Scientific AR127
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    Eyepieces - Orion Highlight 7mm, 10mm, 17mm, 25mm & 32mm, Orion Expanse 9mm & 20mm, Celestron 8-24mm Zoom, Agena SWA 26mm, 32mm and 38mm
    Cameras - Canon T5 DSLR, ZWO ASI120MC, Mallincam JR Pro
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  2. #2
    roverich's Avatar
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    This link might help with some ideas ..link here ==> Equatorial Platforms: About Our Platforms This one might give you some ideas as well ..[ame=http://www.youtube.com/watch?v=KSgUX6_VaOk&feature=related]YouTube - A design for an equatorial mount for a dobsonian telescope[/ame]
    16in Night sky Dobsonian F4.5 , 90mm refractor 500mm FL , 7in LX200 classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
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    Please stand in front of one ...

  3. #3
    andyp180's Avatar
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    take a look here,hope it helps my friend.
    clear skies,
    andy

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    andy

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    revelation 20X80 bino's,camlink tp-2500 camera/bino tripod.
    a few bits and pieces and a major addiction
    to the sky.
    ARCHAEOLOGISTS WILL DATE ANY OLD THING

  4. #4
    andyp180's Avatar
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    sorry rich,posted the same time bud.
    clear skies,
    andy

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    andy

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    revelation 20X80 bino's,camlink tp-2500 camera/bino tripod.
    a few bits and pieces and a major addiction
    to the sky.
    ARCHAEOLOGISTS WILL DATE ANY OLD THING

  5. #5
    jimt's Avatar
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    I thought my eq mount looked weird. That thing is awesome!

    Jim
    Celestron C9.25. Atlas EQG mount. Canon 500D unmodded, Celestron ST80 guide scope, SSAG, Meade 6.3 FR, Thousand Oaks dew control with Dewnot straps. Zhumell 8/24mm Zoom, 2"Gso Superview 42mm, Meade 2"QX wide angle 30MM, Meade 1.25 EP and filter set. Tasco 10x50 Zhumell 20x80 bino and a few other odds and ends.
    Now where did I put that clear sky button!

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  6. #6
    Joe Lalumia's Avatar
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    Default

    I know you WANT to take pictures-- but to be honest the platform if leading you down the wrong path.

    Consider just buying a CG5 with a RA motor and a small 80mm refractor to use as your first imaging scope. You can probably buy all of that new for about the same price as a commercial DOB EQ platform.
    ETX 125PE, Stellarvue 80mm BV & Televue TelePod tripod, LX90 8" LNT, 10x50, 15x70mm binoculars, Stellarvue binoviewers, solar filters for all three telescopes..... plus a bunch of ham radios... Ham radio call sign - W1XWX

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    TelescopeMan Web Site

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    search for W1XWX to see my amateur radio web site

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  7. The Following User Says Thank You to Joe Lalumia For This Useful Post:

    Thermodynamics (02-11-2011)

  8. #7
    Thermodynamics's Avatar
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    Default

    Quote Originally Posted by Joe Lalumia View Post
    I know you WANT to take pictures-- but to be honest the platform if leading you down the wrong path.
    I trust you, but can you explain why?


    Quote Originally Posted by Joe Lalumia View Post
    Consider just buying a CG5 with a RA motor and a small 80mm refractor to use as your first imaging scope. You can probably buy all of that new for about the same price as a commercial DOB EQ platform.
    Would a Celestron Nexstar SE work for photography?
    OTAs - Celestron C8 SCT, Clestron C6 SCT, Celestron 102mm MCT, Orion ST-80a, Explore Scientific AR127
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  9. #8
    jenniferchristine's Avatar
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    alt az mounts aren't really suited for Astro pics either -
    Sure you can get them to work quite well, but you end up with filed rotation after 20 seconds or so.
    Even if you get them working with a wedge, they need a lot of work and you can't use them for both on the same night!
    NEQ6 Pro Mount.Meade LX90 ACF 8"OTA, Canon 450D (Rebel XSi) 18-55 and 75-300 lenses. 4000 lens kit .Antares 6.3 focal reducer. Meade Wedge. Orion Starshoot Autoguider.
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  10. #9
    Thermodynamics's Avatar
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    OK, so the Nexstar is out.
    OTAs - Celestron C8 SCT, Clestron C6 SCT, Celestron 102mm MCT, Orion ST-80a, Explore Scientific AR127
    Mount - Celestron CG-5GT, Celestron CG-2
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  11. #10
    ferkijel's Avatar
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    What objects do you want to photograph ? If you think an 80mm refractor will do...don't hesitate. Go the Lalumia path, you can't really beat an EQ refractor for a beginner's AP rig. Thing is...an EQ 5 will be a limiting factor VERY soon down the road. Much faster than the 80mm refractor. Just be aware of what your desires/economy curve looks like.

    If you only want to take a few easy shots (clusters, Orion) get the economical rig and overcome the itch. If you SERIOUSLY want to go into AP...forget the platform. Just resign yourself to the fact that the mount you need starts at $850.
    Zhumell Z12 Deluxe 12" Dobsonian
    Celestron Astromaster 130 EQ
    A whole bunch of EP both 1.25" and 2"

 

 
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