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  1. #1
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    Default Dob and astrophotography



    I have been reading a lot so far these last two days right here in this great site and from what I have learned, you can't do astrophotography with a Dob telescope. Is this true or have I reading the wrong threads.

    Thank you in advance!

  2. #2
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    Default

    You can't do deep space AP with a dob because they require long exposure times, but the moon and planets will be fine by holding the camera up to the EP or buying one of those celestron cams.

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  4. #3
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    Default

    Thanks, then I did read correctly. My main purpose to get started is for AP so I guess a Dob is not for me.

  5. #4
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    Default

    That's why I decided not to get a dob too! I want to get started in AP right away, I don't care that books and everyone recommends not going for AP right away, I'm sure I can do it.

    Enrico
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    and accessories buying spree disease.

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    Quote Originally Posted by Leo View Post
    That's why I decided not to get a dob too! I want to get started in AP right away, I don't care that books and everyone recommends not going for AP right away, I'm sure I can do it.

    Enrico
    I like you attitude Enrico!! (I wish I was that confident!)

    For lots of reasons I got a Dob and don't get me wrong I don't regret it for a minute (I love that scope) but after 3 months on the AP learning curve (EP photography) I've just about outgrown it and am looking around for another!!

    Clear skies

    Carol

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    Heritage 130P

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    Optics 8" Dob
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  7. #6
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    Default

    That is exactly what went thru mi mind. If I get a Dob, I may be disappointed later. Besides, the real reason I want to get into this hubbie is for the AP. I want to collect my own photos, share with friends and family, etc.

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    Default

    Dobs are nice for observeing , There great actually. But as said above you can't set to a polar align. so objects will smear on the photo if it's long than a min. or two...
    Enjoy the Black cause they can't take it back............
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    Default

    ok, so im looking for my first scope and i came across the orion starblast 6i, it also has GOTO. i was going to get the program to hook it up to the laptop to view the night. can this not be done with dob's?

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    Default

    The moon and the bright planets -- that's about it for astro-photography with a standard DOB. You would use a web cam for the planets and take a video-- extracting the frames out later and stacking the best ones using software.

    Just a very few seconds exposure-- or a video.

    See this:
    http://www.astro.shoregalaxy.com/webcam_astro.htm


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    Default

    Quote Originally Posted by MyGod,ItsFullOfStars! View Post
    ok, so im looking for my first scope and i came across the orion starblast 6i, it also has GOTO. i was going to get the program to hook it up to the laptop to view the night. can this not be done with dob's?
    The Orion XT6i is a great telescope. However, it is not a goto telescope. I has a computer object locater which will guide you to an object in the sky. you have to provide the muscle power to move the scope then keep it centered. A goto telescope does this automatically.

    You can put a electronic eyepiece in a dob but electronic eyepieces are limited to showing very bright objects like the moon and some planets and a few stars.

    DOBs were designed as an economical way to have a quality set of optics for viewing the night sky and this they do without question. Photography with a DOB is problematic. Generally their design is such that insufficient back focus is available for prime focus photography, the DOB mount is an azimuth mount that can not adjust for the earth's rotation, with few exceptions (e.g., the new Orion and Skywatcher goto DOBs) no tracking or guidance capability exists which limits photography to short exposures only.

    One reason Schmidt Cassegrain and Maksutov Cassegrain Telescopes are so popular is that they are excellent all around telescopes .... good for viewing and good for photography allowing people to have one telescope that does it all ... sort of a jack of all trades.... not the best in everything but more than good enough.

    However, its not the telescope that's really important in astrophotography, its the mount, tracking, and guidance sytem and we really are talking about an integrated system here. It must be solid, vibration free, provide accurate tracking, keep the object being photographed dead steady in the field of view, and some way must exist to adjust for the earth's rotation. These are requirements that the Dobson azimuth mount is not designed to do.
    SXINIAS

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