High res images in 3bands Aug 21 and 25, 12" aperture.

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Valery
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High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Tue Feb 05, 2019 4:15 pm

Hi all,

Here are four images I took last summer during tests of new 305mm (312mm outside diameter) DERF filters.

Filters were tested in a front of my C14 telescope.

First three images were taken in Ca K, in Ha and at 393nm continuum (10nm bandwidth).

The fourth image was taken August 25 in Ha.

Thanks for looking.

Valery Deryuzhin.
Attachments
AR21719-2018-Aug-21-UT-7h24m-300mm-Ca-K.jpg
CaK image
AR21719-2018-Aug-21-UT-7h24m-300mm-Ca-K.jpg (496.56 KiB) Viewed 798 times
AR21719-2018-Aug-21-UT-7h35m-300mm-393nm.jpg
393nm 10nm bandwidth image
AR21719-2018-Aug-21-UT-7h35m-300mm-393nm.jpg (499.39 KiB) Viewed 798 times
AR21719-2018-Aug-21-UT-7h44m-300mm-Ha.jpg
H-a image
AR21719-2018-Aug-21-UT-7h44m-300mm-Ha.jpg (498.33 KiB) Viewed 798 times
AR12720-2018-08-25-UT06h45m-300mm+ARIES-312mm-DERF.jpg
H-a image August 25
AR12720-2018-08-25-UT06h45m-300mm+ARIES-312mm-DERF.jpg (496.44 KiB) Viewed 798 times
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by eroel » Tue Feb 05, 2019 4:30 pm

Valery:
Superb shots, specially the CaK and the Continuum.
Best regards,
Eric.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by marktownley » Tue Feb 05, 2019 7:43 pm

These are great Valery! The umbra in the first image look burnt out?
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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Tue Feb 05, 2019 9:37 pm

marktownley wrote:
Tue Feb 05, 2019 7:43 pm
These are great Valery! The umbra in the first image look burnt out?
Yes, it was burn out by me with a "curves" tool in the PS CS6. ;)

Otherwise we will not see such a dynamic range for "surface" details.


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by MapleRidge » Tue Feb 05, 2019 11:08 pm

Excellent images Valery...well done :bow

Brian
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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Bruce G » Tue Feb 05, 2019 11:20 pm

Beautiful images Valery

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Wed Feb 06, 2019 6:19 am

Thanks guys!

I published these images (far not all my best) as the illustration of what can be achieved with alternatives to dedicated overpriced solar telescopes and filters. These results were achieved without travelling to high altitudes locations, so, in average location conditions at 1.5m above ground and 55m above sea level in the center of 400000 city, with a total cost (telescope + all filters) of about $6000. And a telescope can be used for all types of night observings. If we go down to 8" aperture, then total cost will drop to $3000 - 3500 and the results still be much better than with 80-100mm overpriced dedicated telescopes and filters.

Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by MAURITS » Wed Feb 06, 2019 9:27 am

Valery, this is high end imaging ...
Regards,
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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by marktownley » Wed Feb 06, 2019 10:10 am

There ever going to be any smaller ERFs you make commercially Valery? 4"? 6"?
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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Wed Feb 06, 2019 12:29 pm

marktownley wrote:
Wed Feb 06, 2019 10:10 am
There ever going to be any smaller ERFs you make commercially Valery? 4"? 6"?
140mm and 155mm were made. Two 155mm readily available for immediate purchase.

Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Carbon60 » Wed Feb 06, 2019 7:29 pm

Exceptional images, Valery. Stunning.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Montana » Thu Feb 07, 2019 10:15 am

I do love your images :bow :bow :bow

Alexandra

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by marktownley » Thu Feb 07, 2019 1:59 pm

Valery wrote:
Tue Feb 05, 2019 9:37 pm
marktownley wrote:
Tue Feb 05, 2019 7:43 pm
These are great Valery! The umbra in the first image look burnt out?
Yes, it was burn out by me with a "curves" tool in the PS CS6. ;)

Otherwise we will not see such a dynamic range for "surface" details.


Valery
What sort of curve profile you using Valery? Share a screen grab of it?
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by marktownley » Thu Feb 07, 2019 2:07 pm

Valery wrote:
Wed Feb 06, 2019 6:19 am
Thanks guys!

I published these images (far not all my best) as the illustration of what can be achieved with alternatives to dedicated overpriced solar telescopes and filters. These results were achieved without travelling to high altitudes locations, so, in average location conditions at 1.5m above ground and 55m above sea level in the center of 400000 city, with a total cost (telescope + all filters) of about $6000. And a telescope can be used for all types of night observings. If we go down to 8" aperture, then total cost will drop to $3000 - 3500 and the results still be much better than with 80-100mm overpriced dedicated telescopes and filters.

Valery
I agree your setup offers exceptional value for money. This year I will be going to a IMX174 chipped camera to get up to the 200fps level. I can get up to 110fps at the moment, so interested to see the difference in the faster frame rate. It's the seeing I struggle with so hopefully the extra fps will give better freeze factor!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!


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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Thu Feb 07, 2019 7:19 pm

pedro wrote:
Thu Feb 07, 2019 3:33 pm
Great HR images, I love the resolution of the second image. Which filter was used? 393nm?, do you sell these filters
This is just a 10nm 393nm filter by Edmund + filter #2 from PST CaK.

Baader K-line filter will do the same. The key factors here not a filter. They are:

1. Optical quality (from DERF to OTA and barlow)
2. Seeing. SSM may greatly help.
3. Very fast and low noise camera.

Your south location will provide many good seeing days, I beleive. Much more than here at my location.


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.


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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by robert » Mon Feb 18, 2019 11:06 am

Really good results, food for thought too!
Robert
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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Mon Feb 18, 2019 12:27 pm

robert wrote:
Mon Feb 18, 2019 11:06 am
Really good results, food for thought too!
Robert
Thanks, Robert. The thought is as simple as 2x2 - for high resolution you need a large aperture. :D
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: High res images in 3bands Aug 21 and 25, 12" aperture.

Post by Valery » Mon Feb 18, 2019 12:52 pm

pedro wrote:
Sun Feb 17, 2019 9:20 pm
Thanks VAlery

I will try to use my Baader K-line filter for HR work
Pedro,

For HR work in the UV you need a well corrected telescope of a larger aperture. I think that 6" APO is barely acceptable for this task.

The most cost effective telescope for HR works accross available spectrum is a cheap second hand C11.
It is light and very compact.


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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