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  1. #1
    Simon Coombs's Avatar
    Simon Coombs Guest

    Default remote telescope control project



    well heres details of my project, its a scope with a camera
    motorised mount, home made electric focuser ( made out of an electric screw
    driver)
    in a wooden box (like a small shed) on wheels connected to the pc in the
    house
    via fibre optic link, the rs232 for telescope mount control, rs484 for
    camera setting control
    and contact closure for the electric focuser along with the video from the
    camera of course
    all go down the same fibre optic, the project is 2/3rds complete.

    the scope is a basic 114mm celestron short tube, when i have more money
    (when kids leave home)
    I hope to get a bigger one.

    I dont know much about video capture cards so any advice appreciated.

    I will post some pics when its complete along with the number of boxes
    of tissues used crying over trying to get it all working properly.

    if anyone has any advice on what im going to do it would be much appreciated

    Regards

    Simon




  2. #2
    Peter Lynch's Avatar
    Peter Lynch Guest

    Default remote telescope control project


    Hmm, fibre optic is an unusual choice - presumably you have a load of
    it lying around (as one does).

    One thing I would suggest is a rain detector. It's sometimes
    hard to know for sure when light rain has started. it's only when
    it becomes torrential that you'd notice the sound it makes.

    Pete

    On 2005-06-09, Simon Coombs <simon.coombs3@ntlworld.com> wrote:


    --
    .................................................. .........................
    .. never trust a man who, when left alone ...... Pete Lynch .
    .. in a room with a tea cosy ...... Marlow, England .
    .. doesn't try it on (Billy Connolly) .....................................


  3. #3
    Simon Coombs's Avatar
    Simon Coombs Guest

    Default remote telescope control project

    yes fibre wouldnt be a choice normaly for money reasons, fibre is fairly
    cheap,
    but the data transmitter and reciever is quite expensive.
    A rain detector!!, that wasnt on my list but could be very handy.
    thanks for that, the roof goes on today, and possible some wiring.

    Simon

    "Peter Lynch" <pete@scyld.local> wrote in message
    news:slrndah6cv.3vv.pete@scyld.local...



  4. #4
    Robin Leadbeater's Avatar
    Robin Leadbeater Guest

    Default remote telescope control project


    "Simon Coombs" <simon.coombs3@ntlworld.com> wrote in message
    news:k8%pe.1053$a5.916@newsfe5-win.ntli.net...
    screw

    Hi Simon,

    My advice would be to see if you can operate your setup "blind" at the
    scope before you invest in cabling it up remotely. One difficulty to be
    overcome with remote operation is being able to find your target. Camera
    fields are typically very small (Are you planning to use something like a
    Mintron?) so unless your Goto pointing accuracy is good enough you will have
    problems. One way round this is to have a separate camera and lens mounted
    as a wide field finder.

    Robin



  5. #5
    Simon Coombs's Avatar
    Simon Coombs Guest

    Default remote telescope control project

    Hi Robin,

    thank you for that reply, and what you have advised did cross my mind, i was
    thinking of trying
    a second small cheap (light) camera looking through the finder scope, what
    do you think of that idea? or would you suggest a piggy backed camera, whats
    a mintron? is that a camera? im planning on using a security camera, that
    can frame integrate
    along with a few other things that should help with getting the most out of
    the scope, ive used it before on a pevious scope and it works well.

    Simon

    "Robin Leadbeater" <robin_astro@nospamhotmail.com> wrote in message
    news:d8ecd3$i3f$1@newsg1.svr.pol.co.uk...



  6. #6
    Colin Dawson's Avatar
    Colin Dawson Guest

    Default remote telescope control project

    I'd recomment piggy backing a Mintron camera. It is a security camera that
    can integrate, I've seen them in operation and you will get real time images
    from it. Here's their web-site address... http://www.mintron.co.uk/


    You might also want to consider getting a motorised zoom lens for it, so
    that you can easily zoom out for rought alignment, then zoom in for fine
    adjustment, obviously, once the object is in the scope FOV, this feature
    becomes unneccessary.

    Regards

    Colin Dawson
    www.cjdawson.com


    "Simon Coombs" <simon.coombs3@ntlworld.com> wrote in message
    news:IVAqe.6995$q46.4449@newsfe1-win.ntli.net...



  7. #7
    Robin Leadbeater's Avatar
    Robin Leadbeater Guest

    Default remote telescope control project


    "Simon Coombs" <simon.coombs3@ntlworld.com> wrote in message
    news:IVAqe.6995$q46.4449@newsfe1-win.ntli.net...
    was
    whats
    of

    Sounds like you have something similar to the Mintron already for your main
    camera. The most sensitive cheap video camera is probably the 1004x.
    http://www.rfconcepts.co.uk/board_ca..._low_light.htm
    but it is not integrating so will not be anywhere near as sensitive as a
    Mintron. It might be good enough to show enough stars through say an SLR
    camera lens though to allow you to line up on your target or star hop to it.
    If you are interested in following it up, I could try mine in video mode
    with an SLR lens and see what it can pick up.

    Robin



  8. #8
    Simon Coombs's Avatar
    Simon Coombs Guest

    Default remote telescope control project

    thanks Robin, that camera looks like it could fit on to my finder scope
    without adding much wieght
    whats the on board lens like? and yes please your offer of seeing what it
    can pick up would be great.
    at £45 its not too expensive

    Simon

    "Robin Leadbeater" <robin_astro@nospamhotmail.com> wrote in message
    news:d8er4n$emo$1@news8.svr.pol.co.uk...



  9. #9
    Simon Coombs's Avatar
    Simon Coombs Guest

    Default remote telescope control project

    Thanks for the advice Colin what youve suggested is def going to be an
    option, along with
    Robins tiny sensitive camera idea,

    I will have to post some pics of where I am so far soon

    Simon
    "Colin Dawson" <newsgroups@cjdawson.com> wrote in message
    news:gIBqe.258601$Cq2.40932@fe2.news.blueyonder.co .uk...



  10. #10
    Robin Leadbeater's Avatar
    Robin Leadbeater Guest

    Default remote telescope control project


    "Simon Coombs" <simon.coombs3@ntlworld.com> wrote in message
    news:4jEqe.12815$m4.10487@newsfe3-gui.ntli.net...

    The lens with the board camera is very wide angle and small apertureand only
    picks up the brightest stars. A better bet might be a 50mm SLR lens with a T
    or M42 thread. You can pick these up cheaply and you can get adapters to
    fit them to the 1004x lens holder(same thread as a webcam). You can see the
    sort of setup here on my website. (with a diffraction grating strapped to
    the front in this case)
    http://mysite.wanadoo-members.co.uk/.../spectra_4.htm
    That should give you roughly a 5 degree field, similar to a finder scope. I
    will try it out with my camera next clear night. Right on cue - it has just
    clouded over :-(

    Alternatively, if you browse the rfconcepts site I think they have boxed
    versions with c mount lenses which might work without any additional
    engineering.

    Robin



 

 
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