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  1. #1
    Jay Swartzfeger's Avatar
    Jay Swartzfeger Guest

    Default Full/near-full moon and Telrad



    Just received my Telrad, took it out tonight and learned the hard way --
    Telrads (and EzFinders, etc.) don't work worth a damn during full moons,
    correct? Or am I simply blind?


    --
    Jay Swartzfeger
    http://www.swartzfeger.com
    Scottsdale, AZ

  2. #2
    boofreak@gmail.com's Avatar
    boofreak@gmail.com Guest

    Default Full/near-full moon and Telrad

    I don't even bother observing when the moon is out. It washes
    out the sky just as bad, and often worse, than man-made light
    pollution. I might look at planets, but that's about it.

    Jay Swartzfeger wrote:


  3. #3
    tony_flanders@yahoo.com's Avatar
    tony_flanders@yahoo.com Guest

    Default Full/near-full moon and Telrad

    Jay Swartzfeger wrote:


    That's not my experience. I've used a Telrad to sight on the Moon quite
    frequently. As for the Orion EZ Finder, it's bright enough to work
    during
    broad daylight -- let alone moonlight.

    - Tony Flanders


  4. #4
    Sam Wormley's Avatar
    Sam Wormley Guest

    Default Full/near-full moon and Telrad

    Jay Swartzfeger wrote:

    If you know where something is with respect to a bright star, the
    telrad's circles are quite useful. BTW, there is an awful lot to
    study on the moon... even when near full.


  5. #5
    Phil Wheeler's Avatar
    Phil Wheeler Guest

    Default Full/near-full moon and Telrad

    Jay Swartzfeger wrote:


    Don't work in what sense? Are you saying the brightness of the moon is
    not allowing you to see the red circles? That should not be the case
    when looking anywhere not directly at the moon.

    I use mine (both Telrads and Rigel QFs) all times of the month -- e.g.,
    for point to Mars even when the moon is bright.

    If you are using dimmer guide stars to find a DSO or some such thing --
    yes the bright moon can be a problem.

    Phil

  6. #6
    Jay Swartzfeger's Avatar
    Jay Swartzfeger Guest

    Default Full/near-full moon and Telrad

    In article <Hfmff.1958$2k6.108@tornado.socal.rr.com>,
    Phil Wheeler <w6tuh-ng4@yahoo.com> wrote:


    No, the red circles are bright enough, and I like the variable
    brightness feature. I had planned on using the Telrad as a starhopping
    aid to grab those DSOs I've had problems bagging, but the full/near-full
    moon obliterates all but the brightest stars (Rigel, etc.), limiting its
    usefulness. I'm guessing it would be the same in the city or under
    light-polluted skies.


    Yep, that's it -- but once I walked outside last night, I realized I
    wouldn't be doing any DSO stuff before I looked through the Telrad. It's
    still a newbie mistake I make: going out at night with no pre-planning.
    A simple look at the calendar would've told me last night was a moon
    night, not a DSO night.

    --
    Jay Swartzfeger
    Scottsdale, AZ

  7. #7
    Starlord's Avatar
    Starlord Guest

    Default Full/near-full moon and Telrad

    I use my telrad ( can't live without it ) during all my viewing, full moon
    to new moon.


    --

    The Lone Sidewalk Astronomer of Rosamond
    Telescope Buyers FAQ
    http://home.inreach.com/starlord
    Astronomy Net Online Gift Shop
    http://www.cafepress.com/astronomy_net
    In Garden Online Gift Shop
    http://www.cafepress.com/ingarden
    Blast Off Online Gift Shop
    http://www.cafepress.com/starlords




    "Jay Swartzfeger" <swartzfeger@gmail.com> wrote in message
    news:swartzfeger-CFDF75.00471618112005@news.ispnetbilling.com...



  8. #8
    John Nichols's Avatar
    John Nichols Guest

    Default Full/near-full moon and Telrad


    "Jay Swartzfeger" <swartzfeger@gmail.com> wrote in message
    news:swartzfeger-CFDF75.00471618112005@news.ispnetbilling.com...
    I was out with mine last Saturday, under a very near full Moon, and had no
    trouble sighting on and observing. Now, a bright Moon will wash dimmer
    objects out, but that should have little to nothing to do with sighting on
    something you can see with your naked eye.



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

    Default Full/near-full moon and Telrad


    "Jay Swartzfeger" <swartzfeger@gmail.com> wrote in message
    news:swartzfeger-A03DB2.09363318112005@news.ispnetbilling.com...
    As pointed out, those circles are a tool. If you know the distance between
    two given points, you can use them to guide you to where you want to go.



  10. #10
    tony_flanders@yahoo.com's Avatar
    tony_flanders@yahoo.com Guest

    Default Full/near-full moon and Telrad

    Jay Swartzfeger wrote:


    Ah, now I understand what you were saying.

    Full Moon under an otherwise pristine sky is a tad darker than a
    moonless night
    at my home in Cambridge, MA, so I'm pretty familiar with observing
    under these
    conditions. You might be surprised how many stars you can see if you
    try --
    somewhere between mag 4.0 and mag 5.0 except right near the Moon, I
    would
    guess. Of course, you won't be able to see all of those through the
    Telrad
    window, which darkens the view considerably.

    Anyway, that's still enough stars so that I can land a fair number of
    DSOs
    in a wide-field eyepiece using just the Telrad. It's something you've
    got to
    practice, mind you. But for the more obscure DSOs, I prefer to hop from
    the nearest bright star. Again, a wide-field eyepiece helps a lot for
    doing
    that. Or a good finderscope.

    - Tony Flanders


 

 
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