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Small bore challenge: Mars w/ 6" or less

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#801 HarveyDeckAstro

HarveyDeckAstro

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Posted 29 January 2021 - 08:29 PM

Mars on Jan 29, 2021, UT 11 pm. 5'' Newtonian. 40,000 frames, 250 fps, 10 percent stack in AS3, RS6 sharpened. 3X Barlow. I used to stack 2X and 3X Barlow. Still debating whether 3X Barlow alone is just fine.

 

Mars is small, but it is the only planet available to see any details right now :-)

Attached Thumbnails

  • Mars-2021-01-29-2258_AS10-R6-PS.jpg

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#802 HarveyDeckAstro

HarveyDeckAstro

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Posted 30 January 2021 - 09:55 PM

Another clear sky tonight! So it is the Mars time. Taken 2 hours apart, to see the effect of rotation. ~40 k, 10 percent stack AS3, RS6 sharpen. This time experimented with stacking 2x and 3x Barlow. Seems the details are more defined than the previous night's 3x Barlow take. The theory says I should shoot at 5 times the pixel size of the camera, ~3 mircon. So f15, and 3x Barlow. But in reality, 6x and f30 seems give more refined details. Don't know why. Any thoughts?

Attached Thumbnails

  • Mars-2021-01-30-2312_0130-half.jpg

Edited by HarveyDeckAstro, 30 January 2021 - 10:07 PM.

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#803 ROursamajor

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Posted 31 January 2021 - 02:22 AM

No problem if you have oversampling. Don't forget that you use Lucky Imaging technique and, by this, the practise cheats theory. ;)


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#804 HarveyDeckAstro

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Posted 31 January 2021 - 08:03 AM

No problem if you have oversampling. Don't forget that you use Lucky Imaging technique and, by this, the practise cheats theory. wink.gif

Indeed, I guess whatever works! Now I also try to have a softer touch in sharpening following your suggestions. But still can't help sometimes :-)



#805 daniele.bonfiglio

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Posted 05 February 2021 - 09:45 AM

My best Mars, dated 6 November 2020. Mak 127 with telextender 2x, Fujifilm X-T30. Stack of 400 of 1250 still images with PSS (drizzle 3x). RGB align and sharpening again with PSS. Final curves adjustment with GIMP.

 

RGB_pss_f400_p32_b20_ap72_rgbalign_gpp_gimp.jpg


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#806 HarveyDeckAstro

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Posted 06 February 2021 - 09:28 AM

Very cool! Love the details!


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#807 daniele.bonfiglio

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Posted 08 February 2021 - 03:00 AM

Very cool! Love the details!

Thank you for appreciating my picture. Here is a comparison with a simulation for the same date and time. (The simulation does not take into account that a part of the planet was actually in shadow) 

 

marte_new.jpg


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#808 HarveyDeckAstro

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Posted 08 February 2021 - 02:54 PM

Love the comparison! Really shows how good the image is!


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