High res images in 3bands Aug 21 and 25, 12" aperture.
High res images in 3bands Aug 21 and 25, 12" aperture.
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.
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
-
- CaK image
- AR21719-2018-Aug-21-UT-7h24m-300mm-Ca-K.jpg (496.56 KiB) Viewed 326 times
-
- 393nm 10nm bandwidth image
- AR21719-2018-Aug-21-UT-7h35m-300mm-393nm.jpg (499.39 KiB) Viewed 326 times
-
- H-a image
- AR21719-2018-Aug-21-UT-7h44m-300mm-Ha.jpg (498.33 KiB) Viewed 326 times
-
- H-a image August 25
- AR12720-2018-08-25-UT06h45m-300mm+ARIES-312mm-DERF.jpg (496.44 KiB) Viewed 326 times
"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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- eroel
- Way More Fun to Share It!!
- Posts: 4319
- Joined: Mon Dec 19, 2011 10:45 pm
- Location: México D.F.
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Valery:
Superb shots, specially the CaK and the Continuum.
Best regards,
Eric.
Superb shots, specially the CaK and the Continuum.
Best regards,
Eric.
- marktownley
- Librarian
- Posts: 24842
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
These are great Valery! The umbra in the first image look burnt out?

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!
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Yes, it was burn out by me with a "curves" tool in the PS CS6.marktownley wrote: ↑Tue Feb 05, 2019 7:43 pmThese are great Valery! The umbra in the first image look burnt out?

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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- MapleRidge
- Way More Fun to Share It!!
- Posts: 5383
- Joined: Fri Jan 13, 2012 11:58 pm
- Location: Cambray, ON Canada
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Excellent images Valery...well done
Brian

Brian
Brian Colville
Maple Ridge Observatory
Cambray, ON Canada
Maple Ridge Observatory
Cambray, ON Canada
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Beautiful images Valery
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
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 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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Valery, this is high end imaging ...
Regards,
Maurits
Vista del Cielo Observatory
www.vistadelcielo.be
Maurits
Vista del Cielo Observatory
www.vistadelcielo.be
- marktownley
- Librarian
- Posts: 24842
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
There ever going to be any smaller ERFs you make commercially Valery? 4"? 6"?

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!
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
140mm and 155mm were made. Two 155mm readily available for immediate purchase.marktownley wrote: ↑Wed Feb 06, 2019 10:10 amThere ever going to be any smaller ERFs you make commercially Valery? 4"? 6"?
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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- Carbon60
- Way More Fun to Share It!!
- Posts: 5642
- Joined: Wed Mar 07, 2012 12:33 pm
- Location: Lancashire, UK
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Exceptional images, Valery. Stunning.
Stu.
Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/
- Montana
- Way More Fun to Share It!!
- Posts: 20033
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
I do love your images

Alexandra



Alexandra
- marktownley
- Librarian
- Posts: 24842
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
What sort of curve profile you using Valery? Share a screen grab of it?Valery wrote: ↑Tue Feb 05, 2019 9:37 pmYes, it was burn out by me with a "curves" tool in the PS CS6.marktownley wrote: ↑Tue Feb 05, 2019 7:43 pmThese are great Valery! The umbra in the first image look burnt out?
Otherwise we will not see such a dynamic range for "surface" details.
Valery

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!
- marktownley
- Librarian
- Posts: 24842
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
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!Valery wrote: ↑Wed Feb 06, 2019 6:19 amThanks 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

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!
- pedro
- Way More Fun to Share It!!
- Posts: 6467
- Joined: Sun May 01, 2016 8:26 pm
- Location: Portugal
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Great HR images, I love the resolution of the second image. Which filter was used? 393nm?, do you sell these filters
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- pedro
- Way More Fun to Share It!!
- Posts: 6467
- Joined: Sun May 01, 2016 8:26 pm
- Location: Portugal
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Thanks VAlery
I will try to use my Baader K-line filter for HR work
I will try to use my Baader K-line filter for HR work
- robert
- Way More Fun to Share It!!
- Posts: 2424
- Joined: Fri Oct 14, 2011 1:49 pm
- Location: Isle of Skye, Scotland
- Contact:
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Really good results, food for thought too!
Robert
Robert
images and animations http://tinyurl.com/h5bgoso
2019 images https://tinyurl.com/yd5vht7r
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
ED80. ED100. SW200. Celestron-150mm-PST mod. C9.25. ES127
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265
2019 images https://tinyurl.com/yd5vht7r
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
ED80. ED100. SW200. Celestron-150mm-PST mod. C9.25. ES127
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
Thanks, Robert. The thought is as simple as 2x2 - for high resolution you need a large aperture.

"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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Re: High res images in 3bands Aug 21 and 25, 12" aperture.
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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Who is online
Users browsing this forum: No registered users and 6 guests