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Thread: Sketching with a Dob mount?

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    Default Sketching with a Dob mount?



    Anyone sketch without a motor driven scope?
    If so, how do you manage with high magnifications.. eg. the Moon, and also the constant shifting of stars with each nudge, particularly near the edge of FOV?
    I would love to practice this craft, and sketch the Messier catalogue/Luna. I refuse to begin though, if it will cause me to second guess my Dob purchase and cause "justification" to spend more astro bucks!
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    Draw realllyyy fast????

    (sorry but I couldn't resist)
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    Quote Originally Posted by ghswen View Post
    Draw realllyyy fast????

    (sorry but I couldn't resist)
    Actually, you have to draw, really, really, really, really, really, really, fast!

    On a more serious note, I quite frankly don't know how you could do it at high mag. Objects simply move out of the field too quickly. I don't know how you could have enough time to draw while keeping the scope on the object.

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    I can see how drawing the main object would be quite feasible, but the surrounding "context" would vary at the edge of the FOV with each nudge.. seems like it might be frustrating. Maybe if you drew the field to say, 2/3 of the FOV?

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    I have gotos and don't have the problem of keeping the scope on the object. I just concentrate on the object that I am viewing and and a few relevant stars, if any. I really don't worry that much about the background stars, especially the ones away from the object. With my drawing skills, background stars often aren't even close enough for horse shoes anyway.
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    That's a valid point, I guess dead on accuracy is why cameras were invented. In that respect, moon features may even be quite doable as long as the power is not too high. Well, I guess it's obviously doable since it has been done for hundreds of years.. although it remains to be seen if I have the patience that those folks had. Smart money says no. :P

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    Quote Originally Posted by GriffinBF View Post
    That's a valid point, I guess dead on accuracy is why cameras were invented. In that respect, moon features may even be quite doable as long as the power is not too high. Well, I guess it's obviously doable since it has been done for hundreds of years.. although it remains to be seen if I have the patience that those folks had. Smart money says no. :P
    Don't feel bad, Griffin. I doubt that I would have the patience either! I'm certainly no Galileo!

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    My 10" is on an equatorial mount but is non motorized, with your 12" you should have no problems with sketching, as a general rule of thumb I sketch in the following order, with a red light hanging from my neck just bright enough to see the pencil marks.
    1. do a basic outline sketch of the object after a good observation.
    1a. for globulars use the point of the pencil and dot the outline shape of the cluster.
    for nebula's and galaxies draw the outline shape with very light strokes.
    2. make another observation and fill in the details of the object.
    2a. for globulars you can either fill in the center with solid pencil and smudge it a bit
    or just start dotting away in the middle and work your way out.
    for nebula's and galaxies sketch in the brightest parts first using a heavy stroke
    and decrease pressure for light areas.
    3. fill in any field stars as needed.
    4. for accurate open clusters you can use graph paper then scan the image.
    5. an alternate method for nebula and galaxies is to use a subtraction method,
    use a soft lead or charcoal and fill you sketch circle then use an eraser
    to draw the object, use a pencil again to fill in any dark details.

    The higher the magnification the more observations and movements of the scope will be required, I have done sketches in the past that have taken an hour or more to complete and others can take only several minutes.
    Sketches can of course be scanned to the computer and digitally enhanced for near photographic quality, this allows you to add field star color or you can get creative and add color to your main objects, I personally don't add color but it's impressive to see.
    Gerry1 10" f5 Newtonian Equatorial mount.
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    Thanks for the great tips Gerry
    I see I have some practice ahead. At the moment I'll have to settle for near sky objects.. stratus, cumulus, cirrus, etc. My plan was to submit sketches along with the notes for my Messier Certificate, in other words.. start over. I have become convinced that drawing the objects will improve my observing skills and is in keeping with my new found philosophy to "slow down".

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    Quote Originally Posted by GriffinBF View Post
    Thanks for the great tips Gerry
    I see I have some practice ahead. At the moment I'll have to settle for near sky objects.. stratus, cumulus, cirrus, etc. My plan was to submit sketches along with the notes for my Messier Certificate, in other words.. start over. I have become convinced that drawing the objects will improve my observing skills and is in keeping with my new found philosophy to "slow down".
    Thats about all I've been able to look at lately as well, maybe tonight?
    And yes, sketching will definitely improve your powers of observation.
    I have a similar goal with the Messier objects then move on to the NGC.
    The Moon is a great target as well, practice on individual features along the terminator, slow and steady is the key.
    Gerry1 10" f5 Newtonian Equatorial mount.
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