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May 9, 2022: Arzachel, Alphonsus and Ptolemaeus

Discussion in 'Astrophotography and Imaging' started by Ed D, May 9, 2022.

May 9, 2022: Arzachel, Alphonsus and Ptolemaeus

Started by Ed D on May 9, 2022 at 10:31 AM

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  1. Ed D

    Ed D Well-Known Member

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    Last night I did a first imaging run using my 10" Dob on the tracking platform. I chose a section of the moon with three craters that I like: Arzachel, Alphonsus and Ptolemaeus. At first I used my ZWO ASI290MC camera with a 2x Barlow. If it had been a still night I could have gotten good videos, but the wind was gusting strongly. Also, the heat was bad all day and into the night and the image danced like a blob of Jello. Not a good night at all. I pulled the Barlow out and just used the camera. Much, much better. With the big Dob I really didn't need the Barlow. Shimmering was now tolerable and the wind didn't blow the image around that badly. I also liked the way the three subject craters were framed by the lunar landscape. Adjusting the motor speed was challenging in the wind, and I finally found the 'sweet spot' in the platform travel for solar system imaging. Everything came together and I shot the video that produced this image.

    2022 05-08 Moon.jpg
    Lunar craters Arzachel, Alphonsus and Ptolemaeus (image center)

    One upgrade I want to do to the platform are adjustable front feet. The platform is spot on for my latitude when set on a level floor. However, my patio slab is slanted away from the house for rain to run off.

    I want to try imaging the moon with my DSLR. The Dob is big and has a long focal length. Two advantages are the large aperture for increased detail, and a big image size without using Barlows.

    Ed D
     
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  2. Orion25

    Orion25 Well-Known Member

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    Nice definition on those craters, Ed. I'm curious to see how the DSLR shots come out!
     
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  3. Mak the Night

    Mak the Night Well-Known Member

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    Nice shot Ed.
     
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  4. Ed D

    Ed D Well-Known Member

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    Thanks guys.

    According to astronomytools.com, the DSLR will image a full lunar frame. One big difference is that the DSLR has 18Mp vs 1.2Mp of the ASI290MC, as well as the DSLR having larger pixels. I believe the larger sensor will probably capture enough image that I can crop in on craters and still have good detail. We will see.

    Now, if I can get decent skies and a little cooler night temperatures.

    Ed
     
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