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  1. #1
    shawn o'deal's Avatar
    shawn o'deal Guest

    Default eyepiece adapter recommendations



    i have a camera adapter from meade. the one that has a adjustable length and
    allows a eyepiece to be locked into the unit prior to the camera t-ring. i
    am finding that the eyepiece size is limited. anyone know what the
    limitations on this adapter are? what eyepieces will work... i was able to
    put a 20mm kellner into it, but my 25mm sirius plossel won't fit. anyone
    have any experiance with this adapter? BTW it is a 1-1/4" adapter.
    thanks
    john



  2. #2
    Michael A. Covington's Avatar
    Michael A. Covington Guest

    Default eyepiece adapter recommendations


    "shawn o'deal" <shawn.odeal@gte.net> wrote in message
    news:1fnob.35526$AU.16602@nwrddc01.gnilink.net...
    and

    This is of course an adapter for eyepiece projection (positive projection),
    and you've hit upon its main limitation, which is that only old-style,
    relatively compact eyepieces will fit into it.

    What kind of telescope are you using? I have found that, optically,
    eyepiece projection is usually not the best mode. If you'll describe your
    setup, we may be able to find you some more options.


    --
    Clear skies,

    Michael Covington -- www.covingtoninnovations.com
    Author, Astrophotography for the Amateur
    and (new) How to Use a Computerized Telescope




  3. #3
    shawn o'deal's Avatar
    shawn o'deal Guest

    Default eyepiece adapter recommendations

    i am using a 120mm f8. refractor. it is a orion skyview pro.
    thanks



    "Michael A. Covington" <look@www.covingtoninnovations.com.for.address> wrote
    in message news:jwydnSFy6N0X4j-iU-KYiA@speedfactory.net...
    i
    to
    projection),



  4. #4
    Michael A. Covington's Avatar
    Michael A. Covington Guest

    Default eyepiece adapter recommendations


    "shawn o'deal" <shawn.odeal@gte.net> wrote in message
    news:nhJob.22274$Q9.11227@nwrddc02.gnilink.net...

    OK, let me suggest a good book that includes diagrams of how these adapters
    go together... You should be able to reach focus at prime focus, and for a
    bigger image, one thing that works very well is to put a teleconverter on
    the camera. I assume you're using a 35-mm SLR.

    By the way, that telescope sounds *ideal* for next week's lunar eclipse (at
    prime focus).

    Clear skies,

    Michael Covington -- www.covingtoninnovations.com
    Author, Astrophotography for the Amateur
    and (new) How to Use a Computerized Telescope






  5. #5
    shawn o'deal's Avatar
    shawn o'deal Guest

    Default eyepiece adapter recommendations

    what book were you referring to?
    thanks
    john


    "Michael A. Covington" <look@www.covingtoninnovations.com.for.address> wrote
    in message news:uvqdnTw6eLFmJj6iU-KYiw@speedfactory.net...
    adapters
    (at



  6. #6
    Michael A. Covington's Avatar
    Michael A. Covington Guest

    Default eyepiece adapter recommendations


    "shawn o'deal" <shawn.odeal@gte.net> wrote in message
    news:cdcpb.56077$AU.8978@nwrddc01.gnilink.net...

    The one I wrote (Astrophotography for the Amateur).

    http://www.covingtoninnovations.com/astro



    Clear skies,
    Michael





  7. #7
    shawn o'deal's Avatar
    shawn o'deal Guest

    Default eyepiece adapter recommendations

    the thing is,
    with a barlow or a teleconverter (as suggested in your book) i did get it
    your book btw...the problem is, it appears you are limited to only 2 or 3 X
    which is less then i was hoping for, so i had hoped to use the eyepiece
    projection setup. my problem is finding focus. with the prime focus setup i
    would have the focuser on the scope all the way out, and the object was
    (almost) in focus. am i right in assuming that a teleconverter or a barlow
    will help in extending the focus?
    thanks
    john

    "Michael A. Covington" <look@www.covingtoninnovations.com.for.address> wrote
    in message news:ysqdnShpVa2iyDiiU-KYjA@speedfactory.net...



  8. #8
    Michael A. Covington's Avatar
    Michael A. Covington Guest

    Default eyepiece adapter recommendations


    "shawn o'deal" <shawn.odeal@gte.net> wrote in message
    news:VRcpb.26930$Q9.8356@nwrddc02.gnilink.net...
    X
    i

    Can you describe the whole setup?

    Is it a Newtonian? In that case, you might have to use eyepiece projection
    in order to reach focus. Plossl eyepieces are generally reported to work
    best.

    Afocal also works very, very well.



  9. #9
    shawn o'deal's Avatar
    shawn o'deal Guest

    Default eyepiece adapter recommendations

    it is a 120mm orion refractor. a olympus om1 with a t-ring and a meade
    adjustable adapter. (insert eyepiece into adapter and thumb screw lockdown.)
    or it can be used prime focus, the length is adjustable. i am hoping that if
    i put a barlow or a teleconverter on, it will allow me to better focus the
    camera as right now it won't quite go into focus.
    thanks
    john

    "Michael A. Covington" <look@www.covingtoninnovations.com.for.address> wrote
    in message news:qridndvqa9J39DiiU-KYuA@speedfactory.net...
    it
    3
    setup
    barlow
    projection



  10. #10
    Michael A. Covington's Avatar
    Michael A. Covington Guest

    Default eyepiece adapter recommendations


    "shawn o'deal" <shawn.odeal@gte.net> wrote in message
    news:bKepb.27229$Q9.25794@nwrddc02.gnilink.net...
    lockdown.)
    if

    If it's close, a Barlow might solve the problem. A teleconverter on the
    camera won't. (Remember, camera lenses come to focus in the same position
    with a teleconverter as without it; the teleconverter is designed to take up
    the right amount of space. The Barlow, however, inserts into the tube and
    *may* help.)

    Afocal coupling (camera lens aimed into eyepiece) is the mode I actually
    prefer. I have an LE-adapter (www.lensadapter.com) and like it very much.
    It's a bit expensive, but if you have one, you will never have to buy any
    optics to couple your camera to your telescope -- it works with your
    existing camera lenses (including digital cameras) and eyepieces.



 

 

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