Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Convection Cells, Chromosphere in High Res, Full Disc | Sept 11th 2019

  • Please log in to reply
16 replies to this topic

#1 MalVeauX

MalVeauX

    Fly Me to the Moon

  • *****
  • topic starter
  • Posts: 5583
  • Joined: 25 Feb 2016
  • Loc: Florida

Posted 11 September 2019 - 11:26 AM

Hey all,


Had some clear skies this morning. Seeing was pretty good. Not a lot of features, so went for a high resolution look at features in the photosphere and chromosphere as there is always something to see there at fine scales.

 

B&W

 

48717421916_94d982745b_b.jpg

 

48717420741_2986f1ecfa_b.jpg

 

48717090678_5c93c52631_b.jpg

 

48717423296_e566fae9f5_b.jpg

 

48717102243_b04f02af03_b.jpg

 

Colored:

 

48717421221_eed2b75d1c_b.jpg

 

48717591732_68dc5b5cee_b.jpg

 

48717597442_ef268a46f6_b.jpg

 

48717087008_66c8a4bd79_b.jpg

 

48717436806_698eb3f2d3_b.jpg

 

C8 Edge + Aires Full Aperture D-ERF

PST for Full Disc

ASI290MM camera

 

Very best,


  • Dagobert, George Bailey, rigel123 and 8 others like this

#2 MAURITS

MAURITS

    Vanguard

  • -----
  • Posts: 2059
  • Joined: 22 Sep 2009
  • Loc: Belgium

Posted 11 September 2019 - 12:13 PM

Beautiful images Marty, nice equipment.


  • MalVeauX likes this

#3 clintmk89

clintmk89

    Sputnik

  • *****
  • Posts: 31
  • Joined: 05 Aug 2019
  • Loc: East Texas

Posted 11 September 2019 - 04:15 PM

Very nice :) makes me wanna take out my PST soon.
  • SpaceConqueror3 and MalVeauX like this

#4 RickV

RickV

    Vanguard

  • -----
  • Posts: 2098
  • Joined: 17 May 2013
  • Loc: Ottawa, ON, Canada

Posted 11 September 2019 - 07:25 PM

Lovely images Marty!

 

Best,

Rick


  • MalVeauX likes this

#5 rigel123

rigel123

    Hubble

  • *****
  • Posts: 16442
  • Joined: 29 Jun 2009
  • Loc: SW Ohio

Posted 11 September 2019 - 08:42 PM

Nice details!


  • MalVeauX likes this

#6 ValeryD

ValeryD

    Vendor (Aries)

  • ****-
  • Vendors
  • Posts: 1915
  • Joined: 26 Nov 2005
  • Loc: Kherson, Ukraine.

Posted 11 September 2019 - 10:16 PM

Marty,

 

So nicely detailed images with your 8" solar cannon!  Great resolution.

 

Keep them coming.

 

 

Valery


  • MalVeauX likes this

#7 sink45ny

sink45ny

    Surveyor 1

  • *****
  • Posts: 1877
  • Joined: 08 May 2014
  • Loc: Pennsyltucky

Posted 11 September 2019 - 10:31 PM

I like it Marty, but where are the Sun Spots?


  • RickV and MalVeauX like this

#8 PatrickVt

PatrickVt

    Mariner 2

  • -----
  • Posts: 251
  • Joined: 20 Apr 2018
  • Loc: Vermont, US

Posted 12 September 2019 - 11:52 AM

Very nice images, Marty!  I always enjoy viewing your images.  

 

On those white light convection cell images, how many seconds/frames of video do you capture for each image on average?  

 

 

Patrick


  • MalVeauX likes this

#9 BeltofOrion

BeltofOrion

    Vostok 1

  • -----
  • Posts: 151
  • Joined: 07 Jan 2016
  • Loc: Newfoundland, Canada

Posted 12 September 2019 - 02:56 PM

Very nice images, Martin!

 

Raining here since yesterday. Would have liked to have tried capturing this filament visible today: https://tesis.lebede...0912_064251.jpg

 

That must have appeared since your shots yesterday, Martin.


  • MalVeauX likes this

#10 hopskipson

hopskipson

    Surveyor 1

  • *****
  • Posts: 1851
  • Joined: 24 Jun 2010
  • Loc: Queens, New Yawk, Light pollution Headquarters!

Posted 12 September 2019 - 05:26 PM

Hi Marty

 

Nice set of images. like-button.jpg  I see you are using the ASI 290.  I've heard mixed reviews about using it for Solar imaging.  I was actually turned away by a vendor who said that the frame rate is not like what is advertised by ZWO. The images look great so I'm not sure what to expect or why it was not recommended.  What kind of frame rate are you experiencing? Thanks.


  • MalVeauX likes this

#11 MalVeauX

MalVeauX

    Fly Me to the Moon

  • *****
  • topic starter
  • Posts: 5583
  • Joined: 25 Feb 2016
  • Loc: Florida

Posted 13 September 2019 - 05:27 AM

Thanks all, bow.gif

 

 

On those white light convection cell images, how many seconds/frames of video do you capture for each image on average? 

I did a single run on them. I did 1,000 frames, took about 10 seconds. The seeing was good enough that I just focused, could plainly see the cells, did a few seconds of capturing at high frame rate and was done. I stacked 61 frames.

 

 

I see you are using the ASI 290.  I've heard mixed reviews about using it for Solar imaging.  I was actually turned away by a vendor who said that the frame rate is not like what is advertised by ZWO. The images look great so I'm not sure what to expect or why it was not recommended.  What kind of frame rate are you experiencing? Thanks.

I switched out my IMX178 sensor to the 290MM sensor, despite the shutter difference. The 290MM doesn't have grid problems and the frame rate is high. 100+ FPS is not uncommon, depends on a few factors, but I'm recording over USB3 to a SSD and the frame rates are plenty fast and comparable completely to my IMX174 sensor, but with 2.9um pixels which allows me to use shorter focal-ratios and less glass in the pathway. The 290MM is quite sensitive in the Red/IR range. I was surprised that the exposure values on such small pixels were doing so well. I've used it for 430nm, 393nm and 656nm and 742nm and it handles all these wavelengths fine, no weird grid stuff, everything's good. It has a different sensor shape, being more of a rectangle, but beyond that, I'm happy with it so far as a solar imaging camera (and I use it for high res lunar too and it's excellent there as well, very sensitive and can handle 742nm great). Thing is, there just isn't another option with small 2.Xum pixels that can do 100+ FPS yet, so the 290MM is it.

 

Very best,



#12 PatrickVt

PatrickVt

    Mariner 2

  • -----
  • Posts: 251
  • Joined: 20 Apr 2018
  • Loc: Vermont, US

Posted 13 September 2019 - 08:47 AM

Thanks Marty...  61 frames out of 1000.  I would have guessed somewhere between 5 and 10 seconds anyway.  Thanks again!

 

Patrick


  • MalVeauX likes this

#13 MalVeauX

MalVeauX

    Fly Me to the Moon

  • *****
  • topic starter
  • Posts: 5583
  • Joined: 25 Feb 2016
  • Loc: Florida

Posted 13 September 2019 - 09:30 PM

Thanks Marty...  61 frames out of 1000.  I would have guessed somewhere between 5 and 10 seconds anyway.  Thanks again!

 

Patrick

Hey Patrick,

 

I can produce any number of frames and stack them if you want to see the difference from 1 to 1,000 frames. I stacked several types of frames as I do runs of several numbers (like 21, 31, 61, 101 frame) just to have an assortment to work through as a batch process. When the seeing is good, it's so obvious that I don't even have to take another video or consider how many frames and then I just simply take any number of frames that produces the least noise and allows the most latitude in processing with the least blur to begin with. There's generally not a lot of benefit to stacking tons of frames for convection cells. It also depends on the FPS. At slow FPS, stacking more frames can produce more blur as the cells change over time rapidly. With really high FPS, you can stack more frames as more of them are high quality under good seeing moments with lucky imaging and you can stack more to get higher dynamic range, lower noise and more processing latitude.

 

For example, here's 751 frames stacked out of my 1,000 frames to give you an estimation of seeing quality and high FPS to grab lots of frames in a short period of time. This is why I only bothered taking one video. Nearly all the frames were good seeing.

 

Photosphere_200mmF20_IMX174_610nm_751frames_09112019.jpg

 

Very best,



#14 hopskipson

hopskipson

    Surveyor 1

  • *****
  • Posts: 1851
  • Joined: 24 Jun 2010
  • Loc: Queens, New Yawk, Light pollution Headquarters!

Posted 14 September 2019 - 07:48 AM

You can see the last image is not as sharp as the original one posted.  Those convection cells are fast moving!


  • MalVeauX likes this

#15 PatrickVt

PatrickVt

    Mariner 2

  • -----
  • Posts: 251
  • Joined: 20 Apr 2018
  • Loc: Vermont, US

Posted 14 September 2019 - 08:09 AM

Hey Patrick,

 

I can produce any number of frames and stack them if you want to see the difference from 1 to 1,000 frames. I stacked several types of frames as I do runs of several numbers (like 21, 31, 61, 101 frame) just to have an assortment to work through as a batch process. When the seeing is good, it's so obvious that I don't even have to take another video or consider how many frames and then I just simply take any number of frames that produces the least noise and allows the most latitude in processing with the least blur to begin with. There's generally not a lot of benefit to stacking tons of frames for convection cells. It also depends on the FPS. At slow FPS, stacking more frames can produce more blur as the cells change over time rapidly. With really high FPS, you can stack more frames as more of them are high quality under good seeing moments with lucky imaging and you can stack more to get higher dynamic range, lower noise and more processing latitude.

 

For example, here's 751 frames stacked out of my 1,000 frames to give you an estimation of seeing quality and high FPS to grab lots of frames in a short period of time. This is why I only bothered taking one video. Nearly all the frames were good seeing.

 

attachicon.gif Photosphere_200mmF20_IMX174_610nm_751frames_09112019.jpg

 

Very best,

 

Thanks for the extra info, Marty.  

 

I hadn't thought about the changes in the cells over just minutes so that was a good reminder.  

 

My seeing is terrible up here in Vermont.  Day or night, it has simply been terrible for years.  I haven't gotten out with a telescope until closer to 11am though and I've heard that solar is far better earlier in the morning.  I'll have to see if I can see more detail between 8am and 9am when I have some time, some decent health and clear skies.  Although my health is lousy, getting clear skies is the biggest challenge for me.  

 

Thanks again.

 

Patrick


  • MalVeauX likes this

#16 MalVeauX

MalVeauX

    Fly Me to the Moon

  • *****
  • topic starter
  • Posts: 5583
  • Joined: 25 Feb 2016
  • Loc: Florida

Posted 14 September 2019 - 09:55 AM

My seeing is terrible up here in Vermont.  Day or night, it has simply been terrible for years.  I haven't gotten out with a telescope until closer to 11am though and I've heard that solar is far better earlier in the morning.  I'll have to see if I can see more detail between 8am and 9am when I have some time, some decent health and clear skies.  Although my health is lousy, getting clear skies is the biggest challenge for me.  

Early morning seems to be the best seeing for solar. When the sun is closer to Zenith, you would think less atmosphere would be good, but it's awful seeing typically as turbulent air goes all directions. If you live in an area with laminar flow winds like a coast, island, peninsula with coast, and unique areas in mountains where the winds go one direction typically, the seeing can be good at different times. For the rest of us though, it seems that morning seeing even shooting through more atmosphere is better on average.

 

I start my sessions with the largest image scale while seeing is likely its best and as seeing deteriorates I go down in scale to the full discs where seeing is less a problem with the smaller apertures.

 

Very best,


  • PatrickVt likes this

#17 ValeryD

ValeryD

    Vendor (Aries)

  • ****-
  • Vendors
  • Posts: 1915
  • Joined: 26 Nov 2005
  • Loc: Kherson, Ukraine.

Posted 15 September 2019 - 08:12 AM

Early morning seems to be the best seeing for solar. When the sun is closer to Zenith, you would think less atmosphere would be good, but it's awful seeing typically as turbulent air goes all directions. If you live in an area with laminar flow winds like a coast, island, peninsula with coast, and unique areas in mountains where the winds go one direction typically, the seeing can be good at different times. For the rest of us though, it seems that morning seeing even shooting through more atmosphere is better on average.

 

I start my sessions with the largest image scale while seeing is likely its best and as seeing deteriorates I go down in scale to the full discs where seeing is less a problem with the smaller apertures.

 

 

Marty,

 

Tell this to all guys who complained about constant poor seeing at their locations.

And especially tell them to start with the largest aperture first and not with small apertures suitable for a full disk imaging.

 

 

Valery


  • MalVeauX likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics