8 replies to this topic

[james7ca]

On the morning of May 21 and about twenty minutes prior to sunrise the waning crescent moon cleared my roofline allowing me to take this shot at the prime focus of a 60mm Takahashi FOA-60 refractor with a ZWO ASI678MC camera.

 

Image processing with AutoStakkert! (stacking, best 200 of 2000 frames), Registax (wavelet sharpening), Microsoft Image Composite Editor (two frame mosaic), and Photoshop 2025 (tweaks, resize, and labels).

 

You can click on the preview/thumbnail to see the full-sized image as hosted here on CN (1600 x 1200 pixels) and there are additional capture details in the image captions. This is a 60% reduction in size from the original and the reproduction image scale is thus 1.3 arc seconds per pixel.

 

I like to call this phase of the moon the "Death Star Moon," as per this reference on Wikipedia.

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Edited by james7ca, 21 May 2025 - 11:03 AM.

[Sky King]

Sweet image! Thanks for posting!

[jack savard]

I am not a pro like you 

but  this is  marvelous 

imagine if  galileo  see the moon like  this ?

 

I try to  zoom  and  zoom  again  to see  the profil  of mountain  on the  side  of images 

noting  realy  visible

 

is  it possible  ro  have a so  good  zooming  to see  it

 

jack 47  71

[scottinash]

Lovely image, James.   I especially like how Kies Pi is standing out so prominently with the waning crescent phase in your capture!

[james7ca]

Al, Jack, and Scott thanks for the comments and similarly to everyone else for the likes.

 

Here is a 1:1 crop from the original capture showing Kies Pi (a volcanic dome) at a slightly greater scale.

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Edited by james7ca, 22 May 2025 - 12:38 PM.

[PKDfan]

Thats a superb image James !

Aristarchus ray pattern is very nicely delineated more so than i've ever seen. Great Job !

Thanks alot for sharing that ultra crisp shot !


Lance
CSS

[james7ca]

Lance, thanks.

 

Here are 1:1 crops of Aristarchus and the crater Copernicus (the "Death Star" superlaser) taken from the original capture.

 

And, here is a link to the most detailed shot of Aristarchus that I've ever uploaded to CN. However, this was taken about eight years ago with a 9.25" EdgeHD.

 

  https://www.cloudyni.../#entry7531877 

 

Also, a shot of Copernicus taken during that same year and again with the EdgeHD:

 

  https://www.cloudyni...dpost&p=7332406

 

[UPDATE]

It looks like there is a problem in accessing the CN archives (i.e. old posts), thus the above links may or may not work.

[/UPDATE]

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Edited by james7ca, 23 May 2025 - 05:37 AM.

[jack savard]

I am not a pro like you 

but  this is  marvelous 

imagine if  galileo  see the moon like  this ?

 

I try to  zoom  and  zoom  again  to see  the profil  of mountain  on the  side  of images 

noting  realy  visible

 

is  it possible  ro  have a so  good  zooming  to see  it

 

jack 47  71

 

looklike  nobody  interested in  my  interrogation

 

or  

I am  off  topic ???

[james7ca]

Jack, the original. full-disk image is the largest size that can be hosted here on CN, but I've already posted full-scale crops of several areas from my image. However, here is a crop at full scale of the southern half of the moon. But, this reproduction scale is probably beyond what I'd considered appropriate for a color camera. IMO, at 100% (full scale or 1:1) a one-shot-color camera doesn't produce truly sharp results. Also, this image had to be compressed greatly to get under the 500KB posting limit here on CN.

 

Actually, to get the best results on an image you need to finish the processing at the same image scale that you plan to display, and this latest post hasn't been given that compensation (it's a copy from the processing I did for the 60% reduction that I posted initally, just re-applied to the full-scale original).

 

All that said, if you just want to view some close-ups of the moon you can visit the two links I gave earlier in post #7 ( __above__ ). However, perhaps I don't understand what you are asking about and if you are wondering why you can't see similar detail or sharpness when looking visually through your telescope the answer is most probably because of the limits that are imposed by your seeing conditions (i.e. images can get around some of that by just using the best frames from a one or two minute long video).

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Edited by james7ca, 26 May 2025 - 01:06 AM.