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  1. #1
    SenAnthony's Avatar
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    Default Second Night with our new Dob



    So took our Z10 Dob out for the second time about 830pm, and by 930 both we and the Dob were ready to gaze. Started with Jupiter which was high in the sky.. Venus was still visible to some but had set behind trees for us.

    We got Jupiter lined up quickly in our 32MM EP, got it lined to center best we could, tightened the tension control knob on the very bottom of the Dob then proceeded to gingerly take the 2" EP out and put in a 10mm 1.25"... Jupiter nowhere to be found.. hmmm.. I look carefully measuring movements in 4 directions.. Nothing.

    Wifes turn.. Switches to 2" 32mm EP, Jupiter is practically centered. She puts in a new Zoom 8-24mm ep.. at low power and is able after some struggling to find Jupiter.. zooms to 20ish.. refocus.. Jupiter recentered.. Zoom to 16.. refocus.. Jupiter recentered.. Zoom S L O W L Y to 12.. poof.. gone.... back to 16.. still gone.. a bump to the scope? Didnt seem like it to either of us.. but must have..

    For humor sakes, switched back to 32mm .. and Jupiter is right there a little ways off center but still in fov.

    Quite a bit of struggle trying to find targets with anything other then our low power wide angle EP's.

    Finished up our night slightly frustrated with a beautiful view of the Pleiades before calling it a night.

  2. #2
    deaman49's Avatar
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    Default

    Learning curve there when switching oculars. Glad you are having fun!
    Lee

    Zhumell Z10 DOB.
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  3. #3
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    Default

    I thought most zooms were parfocal, meaning you don't have to refocus each time you adjust it. My 7mm-21mm is that way.

    Now I see where the measurment scale on draw tubes can come in handy. Recording various EP focus points can lead you back to focus in no time.
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  4. #4
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    You'll get used to it. The more you use it, the more proficient you'll be.
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  5. #5
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    If you have a good finder scope alignment than it should be easy to recenter an object,, And yes GRASSHOPPER it will take some practice

  6. #6
    SenAnthony's Avatar
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    Quote Originally Posted by John999R View Post
    I thought most zooms were parfocal, meaning you don't have to refocus each time you adjust it. My 7mm-21mm is that way.
    I have the Meade Zoom 8-24.. it's unfortunatly not parfocal.

    What I do like about it is that you don't have to stop at specific intervals of magnification.. aka.. you can dial it in anywhere from 8mm to 24mm ..

  7. #7
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    Default

    You are suffering from a typical dob disease..bumpitis. It doesn't take much to nudge the target out of your FOV, especially at higher powers. That was one of the reasons I went with a go-to dob w/tracking, if I nudge too much..one button gets it right back where it belongs. Fact is, I could be viewing Jupiter, see the glow from Pleiades, manually move to look at Pleiades for 3-5 minutes and then just resume tracking on Jupiter. I love it. But back to your concerns, isn't there some way to tighten up the alt/az play to make it more 'bump' tolerant? Clear skies to you both.

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