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Questar Solar Images

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#1 PKH

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Posted 19 July 2021 - 11:58 PM

Our Questars are quite capable of excellent solar imaging. This might be a good place to show what can be accomplished with the right techniques and equipment. As the activity on the sun increases over the next few years it should be exciting to see what interesting features await discovery and capture.

 

Todays sun 7/19 had little to offer, other than the usual heat and light, when seen in white light. The low resolution full disk image shows two numbered active regions and a new spot just coming into view from the East. Next week should be more interesting as two active regions come into  view.

 

The resolution of full disk images are severely limited by the posting restrictions here but our Questars are capable of much finer details. The extreme magnification produced using a 5x Powermate gives a hint of what is possible. Seeing conditions need to be better than they were today though.

 

The full disk image was taken using the Baader solar film and 540nm continuum filter. A .5x focal reducer was attached to the camera. The camera has a Sony 694 CCD, 1”, 6MP chip. The Sun’s image just fit and focus was almost at the end of it’s range (screwed all the way in). 500 individual frames were recorded and 50 frames were stacked. The resulting image was sharpened , colorized , cropped, and scaled down to 54% of the original and compressed.

 

The magnified images used the solar film and 540nm filter followed by a 5x Powermate and camera with a Sony ICX285, 2/3” CCD chip with 6.45um pixels. The processing was similar.

 

I hope to learn from the experts here in time for the solar maximum.

 

PK

 

July 19 FD1200c2.jpg


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#2 PKH

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Posted 20 July 2021 - 12:00 AM

Here are the closeup images taken July 19th.

 

20210719_093927_AR12842.JPG

 

20210719_AR 12845.JPG

 

20210719_092325_new_spot.JPG

 


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#3 Opie Taylor

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Posted 20 July 2021 - 08:56 AM

Wow, and thx for posting!



#4 PKH

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Posted 21 July 2021 - 05:57 PM

More than a dozen sunspots were visible today! I just had to capture some with the Questar and show them to you.

 

Similar setup as before with the Baader solar film, continuum filter, and a .5x focal reducer for the full disk but instead of a 5x Powermate, I combined a 2x and a 1.5x Barlow for the close up shots.

 

PK

 

July 21 2021 FD.jpg


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#5 PKH

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Posted 21 July 2021 - 06:02 PM

Close up images from July 21.

 

AR12846 

20210721_AR12846.jpg

 

AR12842

20210721_AR12842.jpg

 

AR12845

20210721_AR12845.jpg

 

AR12847

20210721_AR12847.jpg

 

No designation for this group yet

20210721_No_name.jpg


Edited by PKH, 21 July 2021 - 06:13 PM.

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#6 PKH

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Posted 22 July 2021 - 01:33 PM

Today, July 22, was a great day for observing/imaging the Sun through a Questar. Seven active regions and six of those with sunspots! It seems like we’re out of the solar minimum now.

 

I got an early start today and imaged through clear and steady skies. While there were no large spots, just the sheer number of spots and different regions made it interesting.

 

PK

 

 

SolarMonitor.jpg

 

 

20210722_FD.jpg

 


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#7 PKH

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Posted 22 July 2021 - 01:38 PM

Here are some closeups imaged on July 22.

 

AR 12846

20210722_12846.jpg

 

AR12848

20210722_12848.jpg

 

AR12842

20210722_12842.jpg

 

AR12845

20210722_12845.jpg

 

AR12849 and AR18247

20210722_12849_12847.jpg


Edited by PKH, 22 July 2021 - 02:36 PM.

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#8 ETXer

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Posted 22 July 2021 - 06:09 PM

All very nicely done!

 

I managed to grab a few captures today with the Q with the basic off-axis solar filter and a Baader Continuum filter, we’ll see how they turn out (but I’m sure not as high quality as these images). I’m also in the process of amassing a H-alpha setup (one component at a time) for the Q beginning with a Quark Chromosphere and on from there. Hopefully I’ll be able to get started in the fall.

 

Mauri R. (mtr1) has posted some outstanding H-alpha work with the Q here that further illustrates another one of the many ways the Questar can be employed.

 

Cheers, Allan


Edited by ETXer, 22 July 2021 - 08:17 PM.


#9 PKH

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Posted 22 July 2021 - 11:27 PM

Thanks Allan. I hope you post some images here, white light for now and Ha when you get that set up. Solar imaging is a blast. You never know what to expect and every day is different. More so with Ha, flares and surge prominences may last only minutes or even less. The beauty of the chromosphere can become addictive.

 

Oh yes, I know of Mauri’s work and accomplishments with a Questar. He has and continues to advance imaging techniques using a Q. I saw a paper he wrote on imaging. Very helpful indeed. Would I be going too far to call him a Questar imaging guru?

 

I hope to use my ‘61 Q for Ha imaging someday as well.

 

PK


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#10 PKH

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Posted 25 August 2021 - 01:09 PM

Today the Sun presented two active regions that were suitable for white light imaging through the Questar, AR12859 and AR12860. Clouds and haze provided a little relief from the heat and a light breeze made for a delightful imaging session. The old Q powered through it all and recorded some decent images.

 

A 1.5x and 2x Questar Barlow combined, and a Baader solar film and continuum filter were used for the closeups. A .5x reducer was used for the full disk.

 

 

PK

 

fd_clouds.jpg

 

20210825_AR12859.jpg

 

20210825_AR12860.jpg


Edited by PKH, 25 August 2021 - 01:10 PM.

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#11 spereira

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Posted 25 August 2021 - 01:11 PM

Excellent images!  Thanks very much for sharing.

 

smp



#12 Terra Nova

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Posted 25 August 2021 - 06:27 PM

Wonderful detail of the photosphere in your close-up images. Wow!



#13 PKH

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Posted 27 August 2021 - 12:56 PM

The sun is still putting on a show for the old Q today. Three named active regions and one near the SW limb. The latest, AR12861, is just a tiny spot but AR12860 to the south has quite a bit to show. Hazy skies again this morning, but no matter. The 1.5x and 2x Barlows along with the 540nm filter were used for the closeups. The full disk used a .5x focal reducer instead of the Barlows and a larger chipped camera.

 

I can hardly wait for some really big spots to come along.

 

PK

 

 

20210827_Full_Disc.jpg


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#14 PKH

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Posted 27 August 2021 - 12:59 PM

The closeups for August 27th.

 

AR12859

20210827_AR12859.jpg

 

AR12860

20210827_AR12860.jpg

 

SW Limb

20210827_SW_limb.jpg


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#15 vcnightscope2017

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Posted 27 August 2021 - 04:53 PM

Awesome pics! Keep em comin!



#16 PKH

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Posted 28 August 2021 - 12:41 PM

I want to thank everyone who took the time to comment on my images here. When starting this thread I envisioned a place where a variety of different imaging styles and techniques could be seen instead of just my same old imaging style. Maybe a place to learn by looking at other interpretations, who knows?

 

White light solar imaging with our Questars can be quick and easy once a routine is established. There is no need for hour long exposures late into the night or searching for nearly invisible deep sky targets. No swapping of filters, rechecking the focus and guiding, or precise polar alignment is needed, although that can be rewarding as well.   What’s fun is that tomorrow’s solar image will be different.

 

Today’s image took about half an hour, start to finish. Most of the time was spent waiting for clouds and haze to clear enough to have light for recording. Exposures were still over 30ms with a moderate camera gain setting. The same setup as my previous session was used. Two versions of the same image are presented. Any preference?

 

PK

 

 

AR12860 color

20210828_AR12860c.jpg

 

 

AR12860 greyscale

20210828_1AR12860m.jpg


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#17 vcnightscope2017

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Posted 28 August 2021 - 10:21 PM

Color for me. Looks exactly like I saw today with my full aperture 3.5 solar filter with 24 Brandon. 



#18 PKH

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Posted 29 August 2021 - 11:52 AM

How do images taken with our Questar 3.5" telescopes compare to ones from telescopes in space?

 

20210829_AR12860c.jpg

 

20210829_1AR12860m.jpg

 

SDO:HMI_20210829.jpg

 

I think quite favorably.

 

PK


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#19 PKH

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Posted 31 August 2021 - 08:30 PM

The seeing today (8/31) was not great and AR 12860 is approaching the limb but that did not deter the little Q.

 

Today’s images were taken using only the Questar solar filter and a 2x Barlow. No Baader stuff today. A color ccd camera took the first image and a monochrome camera, the second. All things considered, l believe the equipment made a good recording of the sunspot group.

 

PK

 

Color camera

20210831_AR12860c.jpg

 

Monochrome camera

20210831_AR12860.jpg

 


Edited by PKH, 31 August 2021 - 08:32 PM.

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#20 spereira

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Posted 01 September 2021 - 07:59 AM

More excellent images, PK!  Please keep them coming!

 

smp



#21 Mike Allen

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Posted 01 September 2021 - 09:17 AM

Congratulations on achieving such a high level of skill with your Questar.  The images of both you and Mauri are fascinating.  It would be nice to see them grace a Questar Corporation advertisement in some astronomy magazine.



#22 PKH

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Posted 03 September 2021 - 01:57 PM

Very nice comments, thanks.

 

I think Mauri’s images are better than the ones in the old Questar ads. Of course the technology has changed over the years. But, yes, I would like to see some of his images in a Questar advertisement. He has worked with the folks at Questar in the past so they know him and that might help. Maybe we should write some copy “Braymer style” along with some of Mauri’s photos to give them a hint? 

 

Today’s solar image is of AR12863. I’m back to using the Baader 540nm filter and the 2x and 1.5x Barlows. The Questar image is close to the SDO/HMI Quick-Look Continuum 4k x 4k full disk image (cropped of course) so I made a comparison.

 

PK

 

20210903_AR12863_comp.jpg


Edited by PKH, 03 September 2021 - 01:58 PM.

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#23 PKH

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Posted 05 September 2021 - 11:29 AM

Today was a nice day for solar imaging and observing in white light. The sunspots are growing in size and number.

 

The little Questar did well today.

 

PK

 

20210905_FD.jpg

 

20210905_AR12864.jpg

 

20210905_AR12863.jpg

 

20210905_AR12866.jpg


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#24 PKH

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Posted 06 September 2021 - 02:29 PM

Quite a bit of activity on the sun today and after a light rain this morning a patch of blue sky emerged, the Q and I went out to investigate. The sunspots are still growing and with the 2x Barlow, Badder solar film, and continuum filter along with Questar, the spots were captured. Seeing was good after the rain.

 

PK

 

AR12863

20210906_AR12863.jpg

 

AR12864

20210906_AR12864.jpg

 

AR12866 and AR12868

20210906_AR12866_AR12868.jpg


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#25 vcnightscope2017

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Posted 06 September 2021 - 04:56 PM

Nice job PK!




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