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  1. #1
    Reddog's Avatar
    Reddog Guest

    Default Suggestions for a 8" newt ?



    Hi all,

    I have a Meade 114mm Newtonian with Alt-Az motors and I have just
    started using a ToUcam webcam, but getting images of anything other
    than the moon is quite difficult due to focus issues, tripod stability
    and lack of light etc

    So I think it's time to trade up, to maybe a 8" newt with dual motors
    (Goto not required but would be nice). My budget is a bit tight so I
    expect I am not looking at the 'top end' of the market. I am thinking
    of keeping the Meade but I will sell it to increase the budget.

    Any suggestions for a 8" Newt from anyone who uses webcams?

    Also would it be worth getting an electric focuser eg like the home
    brew one at www.switchedsystems.co.uk ? - any one using one?

    Thanks,

    Reddog



  2. #2
    John Carruthers's Avatar
    John Carruthers Guest

    Default Suggestions for a 8" newt ?

    The motors will help a bit but the other problems will still be there. Seeing, Collimation, Aiming
    the thing and Focus, (SCAF or FSCAF) like poverty, will always be with us ;->
    An 8" is a useful size and I'd like an electric focuser. I'm working on using a second webcam as
    an accurate finder.

    --
    John Carruthers
    http://mysite.freeserve.com/jc_atm/
    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:399hv11asnn57lk726sgddfienansrvs3b@4ax.com...



  3. #3
    Reddog's Avatar
    Reddog Guest

    Default Suggestions for a 8" newt ?

    >The motors will help a bit but the other problems will still be there. Seeing, Collimation, Aiming

    Thanks - but what scope do you use ?

  4. #4
    John Carruthers's Avatar
    John Carruthers Guest

    Default Suggestions for a 8" newt ?

    Homebrew 10" F6.1 newt Dob.

    --
    John Carruthers
    http://mysite.freeserve.com/jc_atm/
    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:3uchv1pc3tdb8hp39v5aprcs6regvp2kqh@4ax.com...



  5. #5
    Malcolm Stewart's Avatar
    Malcolm Stewart Guest

    Default Suggestions for a 8" newt ?

    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:399hv11asnn57lk726sgddfienansrvs3b@4ax.com...

    I've had good results from what is labelled as a Helios, but now appears to
    be labelled Skywatcher. It's an 8" Dob but appears to available mounted on
    an equatorial mount. See
    http://www.opticalvision.co.uk/prodt...ageHistory=cat

    and scroll down to
    EXPLORER-200 (EQ5)

    I haven't tried a webcam with it.
    If you do go for one of these, do make sure that you get the proper sleeve
    to allow 2" eyepieces to be used. Although listed in the brochure etc. as
    being 2" capable, it was missing on mine, and ALL attempts to get one after
    purchase failed. What was supplied probably convinced the (non astro savvy)
    supply chain that it would hold a 2" eyepiece, but they had obviously never
    tried it.
    Eventually, I got one made up privately and the views through a wide field
    2" eyepiece were superb.

    --
    M Stewart
    Milton Keynes, UK
    http://www.megalith.freeserve.co.uk/oddimage.htm





  6. #6
    Reddog's Avatar
    Reddog Guest

    Default Suggestions for a 8" newt ?



    Thanks for the reply.

    In fact the exployer 200 HEQ5 is one of the scopes in my 'bookmarks',
    albeit at the extreme end of my possible budget!

    Question: why would one use 2" and not the supplied 1.25" objectives?

    Reddog.

  7. #7
    Reddog's Avatar
    Reddog Guest

    Default Suggestions for a 8" newt ?



    Excuse my ignorance but I thought you couldn't motorize a dob?


  8. #8
    Malcolm Stewart's Avatar
    Malcolm Stewart Guest

    Default Suggestions for a 8" newt ?

    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:4v9jv1l54b1r6pot5171odr37hrfrdjqpl@4ax.com...

    The supplied eyepieces are OK, but I got intrigued by the reports I was
    seeing about the benefits of getting a wide-angle 2" fitting eyepiece.
    These have the benefit that their angle of view isn't restricted by the
    small dimensions of the standard 1.25" eyepieces. So a year ago, I bought a
    30mm 2" fitting 80deg eyepiece. (I wear spectacles which affects my viewing
    comfort with many eyepieces.)
    Look here (download the pdfs for more info)
    http://moonfishgroup.com/catalog/ind...BP&language=en
    for something very similar to what I bought. It's marvellous for checking
    out the Pleiades and other clusters.
    A few years ago all 2" eyepieces were costing serious amounts of money.

    --
    M Stewart
    Milton Keynes, UK
    http://www.megalith.freeserve.co.uk/oddimage.htm



  9. #9
    John Carruthers's Avatar
    John Carruthers Guest

    Default Suggestions for a 8" newt ?

    It's on an EQ platform,gives ~45 minute of tracking before it needs rewinding.

    --
    John Carruthers
    http://mysite.freeserve.com/jc_atm/
    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:l6ajv19tscsa0lnqjpsgj1dcm1rb8dcoab@4ax.com...



  10. #10
    Texy's Avatar
    Texy Guest

    Default Suggestions for a 8" newt ?


    "Reddog" <_no_spam_d-hilton@blueyonder.co.uk> wrote in message
    news:l6ajv19tscsa0lnqjpsgj1dcm1rb8dcoab@4ax.com...

    Ahh, but you can....lotf of work though -
    http://www.bbastrodesigns.com/cot/cot.html


    Regards,
    Texy



 

 
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