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Jupiter & Io 2021-09-10

Planet Maksutov DSLR Astrophotography
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#1 BQ Octantis

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Posted 12 September 2021 - 12:44 AM

Well before Jove was approaching its apex in peak seeing, I snagged a few .mp4s with a moon in the shot. The planet and the moon barely fit together on the LiveView crop, and the moon was obviously moving away from the planet…so with the jittery seeing, it became a real bugger to keep them both in the scene by the third capture. Nonetheless, the third one was the charm:

 

(Click for full size.)

final.jpg

Eyepiece projection, LiveView capture, 79% capture scale

 

For Io, I aligned and stacked separately (2x interpolated). I then used G-RGB to get a crisper disk while keeping some color.

 

Cheers,

 

BQ


Edited by BQ Octantis, 12 September 2021 - 12:46 AM.

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#2 BQ Octantis

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Posted 12 September 2021 - 02:09 AM

Thanks to all for the quick likes!

 

Looking at this on my phone screen, I see a lot of diffraction ringing around the edges of both that I only see on my laptop screen if I zoom way in. So here's a major improvement to the edges with an edge mask:

 

final2.jpg

 

BQ


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#3 Tim J Fowler

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Posted 12 September 2021 - 07:47 AM

Nice grab, BQ! You're doing this all "in camera", correct?

Tim



#4 BQ Octantis

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Posted 12 September 2021 - 08:02 AM

Thanks to all for the likes!

 

Nice grab, BQ! You're doing this all "in camera", correct?

Tim

Thanks Tim! Not sure what you mean by "in camera", but the only way to do LiveView capture in-camera is with MagicLantern. I do it over USB. I use AstroDSLR 1.3 for capture, which records the LiveView stream to a .mp4 at ~9.5 fps. So the "in-camera" function is just converting photons to a LiveView stream over USB. The rest is software.

 

BQ



#5 Tim J Fowler

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Posted 13 September 2021 - 06:46 AM

Thanks to all for the likes!

 

Thanks Tim! Not sure what you mean by "in camera", but the only way to do LiveView capture in-camera is with MagicLantern. I do it over USB. I use AstroDSLR 1.3 for capture, which records the LiveView stream to a .mp4 at ~9.5 fps. So the "in-camera" function is just converting photons to a LiveView stream over USB. The rest is software.

 

BQ

What I meant was without using a PC for capture. Not sure what you mean by "over USB" then, so you are not able to use something like BYEOS? You could triple your fps, but I'm guessing you know that.

Tim


Edited by Tim J Fowler, 13 September 2021 - 06:48 AM.


#6 BQ Octantis

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Posted 14 September 2021 - 01:11 AM

I use my MacBook Pro to capture; by "over USB" I mean

 

600D/T3i ---- USB cable ---- MacBook Pro

 

BYEOS only captures at 20 fps, so if I paid to upgrade to a Windows laptop and paid for BYEOS, I could double my frame rate.

 

BQ



#7 Tim J Fowler

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Posted 14 September 2021 - 07:06 AM

I don't understand, BYEOS only capture at 20 fps? I usually average 28-29 through BYEOS, though granted that's not a huge improvement. Don't think I'd invest in a whole 'nother laptop for it.

Tim



#8 BQ Octantis

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Posted 14 September 2021 - 07:09 AM

I don't understand, BYEOS only capture at 20 fps? I usually average 28-29 through BYEOS, though granted that's not a huge improvement. Don't think I'd invest in a whole 'nother laptop for it.

Tim

 

Sorry, I was going off of Tulloch's reported BYEOS performance from his 700D. If you're getting 28-29 from the 600D, then that's probably what mine would get…


Edited by BQ Octantis, 14 September 2021 - 08:24 AM.

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#9 Tim J Fowler

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Posted 14 September 2021 - 12:14 PM

Sorry, I was going off of Tulloch's reported BYEOS performance from his 700D. If you're getting 28-29 from the 600D, then that's probably what mine would get…

I'd seen that and never thought to ask Andrew why. His 700D should be able to record the same as mine as far as fps goes. Mine does occasionally record as low as 22 fps, and I don't know if that's a limitation in BYEOS while it's writing the file to the specified folder. For some reason in BYEOS that seems to take a really long time. I wonder if camera battery life would affect that. I just look at the files I have on my laptop and about half are at 28-29 fps. I do wonder now what the variable is.

Tim

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Edited by Tim J Fowler, 14 September 2021 - 12:14 PM.


#10 Tulloch

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Posted 14 September 2021 - 07:02 PM

I was only ever able to get 20-21 fps from my 700D, whether I used BackyardEOS or EOS Movie Record, it just seemed to be a limitation of that camera. Grant (RedLionNJ) was able to get higher fps values for his DSLR (I think his was a 600D). I did notice that when I was running off mains power my frame rate was higher than when running off the laptop battery (I only got about 18fps when running off the battery).

 

If you were willing to install Magic Lantern you might be able to get to 30 fps (or possibly even 50/60 fps) like the mdspotter or TaviF...

https://www.cloudyni...slr/?p=11321070

 

Andrew



#11 Quopaz

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Posted 14 September 2021 - 10:33 PM

Nice BQ. I used to get 60 fps with my 60 D.

#12 Tim J Fowler

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Posted 15 September 2021 - 12:52 AM

I was only ever able to get 20-21 fps from my 700D, whether I used BackyardEOS or EOS Movie Record, it just seemed to be a limitation of that camera. Grant (RedLionNJ) was able to get higher fps values for his DSLR (I think his was a 600D). I did notice that when I was running off mains power my frame rate was higher than when running off the laptop battery (I only got about 18fps when running off the battery).

Mine varies, and I always run the laptop plugged in, at least to this point, so I feel there is some other variable affecting frame rate. I was planning on ordering a dummy battery for my T3i anyway because I went through 4 batteries the last time I was out, so I'll at least be able to see if that is the difference.

Tim




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