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  1. #1
    afigueroa's Avatar
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    Default how do you create this digital sketches



    Hi guys, i was looking your work and is fantastic, you really can see what you are going to see with your telescope in similar sizes....

    I am wondering how do you create this digital sketches.... I think i am far to spent some mony on camaras or astrophoto so why not share your observation with this metod and also improve your skill vision....

    Regards
    Antonio
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    http://astrofotoamateur.blogspot.com/
    http://www.flickr.com/photos/astrofotoamateur/

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  3. #2
    AJinUT's Avatar
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    Not sure if your asking for actual digital sketches or astrophotography. In terms of sketching my initial sketch is always done at the eyepiece using graphic pencils, two types of erasers, two types of blending stumps etc. I mainly use a HB and 2H pencil. Once I am done then at some point in the next couple of days I go to GIMP which is a free online program and there you can touch up stars, and other items. Others use Photoshop but at this time GIMP and its price works for me, its free! I can direct you to some sites if you want on how to digitally sketch.

  4. #3
    afigueroa's Avatar
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    i would like to know how were made those in the other post of this same forum.... like these...

    Some more Herschel Sketches

    or these

    Sketches from Observations

    regards
    antonio
    120mm Orion Refractor Achromatic f/8.3, Explore Scientific Levy Comet Hunter 152mm f4.9, William Optics Megrez 90 APO, Sky View Pro Mount and Orion Atlas Mount
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    http://astrofotoamateur.blogspot.com/
    http://www.flickr.com/photos/astrofotoamateur/

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    afigueroa's Avatar
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    yeah.. i saw you did them in the other post.. sorry yes tell me how can i do them...
    regards
    120mm Orion Refractor Achromatic f/8.3, Explore Scientific Levy Comet Hunter 152mm f4.9, William Optics Megrez 90 APO, Sky View Pro Mount and Orion Atlas Mount
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    http://astrofotoamateur.blogspot.com/
    http://www.flickr.com/photos/astrofotoamateur/

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    afiguero,

    Since I made all the sketches that you linked to, I will walk you through what I do. A far more detailed explanation is available at Jeremy Perez's site (he is an outstanding sketcher and has a book published on sketching with several others called Astronomical Sketching. Here is the link on Jeremy's website Digitized Tutorial.

    Here is what I do:

    1) I do my original sketch at the eyepiece. One sketch can take anywhere from 30 minutes to an hour for me. I'm slow, patient and want to capture as much detail as possible. You will have to determine your time based on what you want to do. For me sketching began as a way to increase my seeing on objects and capturing what I am seeing at the eyepiece since I am not into (nor can afford) astrophotography right now.

    2. When the sketch is done, I spray it with a spray that won't let the pencil lead bleed or smudge. I use Blair low odor Spray Mix that achieves this. I let the sketch air dry for a few minutes before I put it into a sealed compartment that protects my individual sketches.

    3. When I go in after my observing session is over, I usually put everything up and note which sketches (I usually do most of them) I want to scan. Next, when I have time on an evening that is cloudy I pull out the sketches and scan them into my computer using my scanner (which isn't very good, it is 8 years old). After I have scanned them, I save them on my computer in a file called Astronomical Sketching. I have been saving them by the date of observation but I might change that to have them by object like Messier, Herschel 400, Planetary Nebula, Galaxies like ARP or NGC etc.

    4. After scanning and saving them on the computer, I launch GIMP. GIMP is a free program like photoshop but not with all the bells and whistles. Google GIMP or here is a link if you have a Windows machine. I have a Mac that I use for doing this and it is available for a Mac as well.

    5. After downloading GIMP I open the sketch I want to work on and make its size 640x640. I then put the magnification at 100% and that brings my objects that I drew into REAL close shape. First item, I have made stars that are round and in different shapes and I pick one that I want to use and begin rounding the stars that I drew. I also select black for the brightest stars, and then a couple of shades of gray for dimmer stars. I can adjust the size of the star/circle by doubling clicking it and adjusting the size.

    Next I examine any shape for like a nebula or a galaxy and I make that shape and put it the sketch on the object I had drawn. Sometimes I leave the object alone if I feel I have captured the shape in the original sketch.

    Finally, I invert the sketch and then add some touches under filter to enhance etc.

    I have a blog and your suggestion has made me decide to post there how I create a digital sketch. I invite you to go to my blog and look around and see how over the last year my approach to sketching has changed, grown, or gone backwards. Tomorrow I'll post up how I do a sketch. Look at Jeremy's link also. Hope that helps.

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    Great work! Thanks for sharing.

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    I like looking at those sketches every bit as much (maybe more?) as looking at good photographs. Beautiful work Jay, thanks for sharing your art and some how-tos.
    Mike
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    The sketches are super for showing what views look like through various kinds and sizes of telescopes .... something that photos just don't do. I for one really appreciate the people who post theirs.
    SXINIAS

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  11. #9
    afigueroa's Avatar
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    Thank you Jay is nice work you do.. i am also far of photograph and this is a beutiful way to share what are you seeing.. i will let you know when i make my first one and share here with you guys.

    Regards
    Antonio
    120mm Orion Refractor Achromatic f/8.3, Explore Scientific Levy Comet Hunter 152mm f4.9, William Optics Megrez 90 APO, Sky View Pro Mount and Orion Atlas Mount
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    Well, here is my latest of NGC 2362 in Canis Major.

    Here is the sketch:



    Here is the sketch enhance to try and show what I saw looking at the Eyepiece.



    This is probably my favorite Open Cluster of the winter. Just north of it and east if I remember right is the winter Alberio, a wonderful double of orange and light blue.

 

 
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