C14 356mm aperture in solar H-a imaging.

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Valery
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C14 356mm aperture in solar H-a imaging.

Post by Valery » Wed Jun 07, 2017 2:49 am

Hi all,

Alessandro asking: "Have you tried the same etalon with C14?"

Yes, I have tried the same etalon with a C14 H-a telescope.

I still not fully satisfied by this setup performance and this is a reason I didn't publish the
photos taken with this set-up. While the telescope itself is really a piece of a real perfection
(Strehl factor is better than 0,985 and the optics is refractor-smooth) I still need to improve
two main H-a components DERF and etalon tuning method.

However I let you, solarchaters, see what the C14 ability is in H-a solar imaging. With the
improvements such a results will be ordinary for this set-up and at better seeing they will be
even better.

To see a native resolution and quality, right click on an interesting image and choose "open picture in a separate window".

Thanks for looking.

Regards,

Valery
Attachments
_C14-EQ8-PST-ZWO174MM.jpg
_C14-EQ8-PST-ZWO174MM.jpg (280.49 KiB) Viewed 1312 times
_385mm-ARIES-D-ERF-on-the-C14.jpg
_385mm-ARIES-D-ERF-on-the-C14.jpg (298.51 KiB) Viewed 1312 times
_07 13 2016 UT 07h 40m 355mm C14 + 385mm D-ERF 2.png
_07 13 2016 UT 07h 40m 355mm C14 + 385mm D-ERF 2.png (1.14 MiB) Viewed 1312 times
_07 13 2016 UT 07h 39m 355mm C14 + 385mm D-ERF 2.png
_07 13 2016 UT 07h 39m 355mm C14 + 385mm D-ERF 2.png (1.59 MiB) Viewed 1312 times
_07 13 2016 UT 07h 37m 355mm C14 + 385mm D-ERF.png
_07 13 2016 UT 07h 37m 355mm C14 + 385mm D-ERF.png (1.47 MiB) Viewed 1312 times
_07 14 2016 UT 07h 51m 355mm C14 + 385mm D-ERF 2.png
_07 14 2016 UT 07h 51m 355mm C14 + 385mm D-ERF 2.png (1.07 MiB) Viewed 1312 times
_07 14 2016 UT 07h 44m 355mm C14 + 385mm D-ERF.png
_07 14 2016 UT 07h 44m 355mm C14 + 385mm D-ERF.png (1.08 MiB) Viewed 1312 times
_07 14 2016 UT 07h 28m 355mm C14 + 385mm D-ERF.png
_07 14 2016 UT 07h 28m 355mm C14 + 385mm D-ERF.png (1.12 MiB) Viewed 1312 times
Last edited by Valery on Thu Jun 08, 2017 12:43 am, edited 3 times in total.
"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: C14 in solar imaging.

Post by marktownley » Wed Jun 07, 2017 5:58 am

Interesting and nice images. Can you describe or show pictures of the etalon tuning method you are using? Maybe people will have some suggestions that can help.
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: C14 in solar imaging.

Post by Montana » Wed Jun 07, 2017 7:10 am

Wow! there are some real crackers there Valery :hamster: :bow :bow

Alexandra

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Re: C14 in solar imaging.

Post by zorgdotnl » Wed Jun 07, 2017 8:16 am

Great setup and picts!!!!!
What etalon system do you use?
To improve local seeing, I would cover everything that is black:
- the rings: they catch heat and transmit it through the tube causing internal local air current (I have some at night on my C8 due to the cooling of the rail on the side...)
- the mount

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Re: C14 in solar imaging.

Post by sulcis2000 » Wed Jun 07, 2017 8:52 am

I love it! :-)
After how many minutes does the closed C14 ota suffer of internal local air current?
Do you think a ota with Quartz primary and secondary mirror (low dispersion) could perform better than a pirex mirror?
Last question...have you tried one of your fantastic D-ERF with a standard Quark (with 4,3X telecentric lens) and then a Focal Reducer to reach a lower EFL.
In the next future I'd like to use my C14HD with my awesome Daystar Quark but the EFL is too high (F/D 47...) I'm asking if is it possible to use a FR like the Solar Spectrum research grade 0,4X (so the F/D it will be about 19...6735 mm of focal length)
http://www.baader-planetarium.com/en/so ... -2%22.html

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Re: C14 in solar imaging.

Post by Valery » Wed Jun 07, 2017 1:54 pm

marktownley wrote:
Wed Jun 07, 2017 5:58 am
Interesting and nice images. Can you describe or show pictures of the etalon tuning method you are using? Maybe people will have some suggestions that can help.
Tilt tuning method.
"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: C14 in solar imaging.

Post by eroel » Wed Jun 07, 2017 2:03 pm

Valery:
Refractor like images and incredible resolution for a non professional observatory.
Best regards,
Eric.

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Re: C14 in solar imaging.

Post by marktownley » Wed Jun 07, 2017 3:09 pm

sulcis2000 wrote:
Wed Jun 07, 2017 8:52 am
After how many minutes does the closed C14 ota suffer of internal local air current?
I use a tempest cooling fan with my 8" HaT and I think it has a positive effect on stabilising things

https://www.deepspaceproducts.com/temp- ... _9331.html
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http://brierleyhillsolar.blogspot.co.uk/
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Re: C14 in solar imaging.

Post by marktownley » Wed Jun 07, 2017 3:11 pm

Valery wrote:
Wed Jun 07, 2017 1:54 pm
marktownley wrote:
Wed Jun 07, 2017 5:58 am
Interesting and nice images. Can you describe or show pictures of the etalon tuning method you are using? Maybe people will have some suggestions that can help.
Tilt tuning method.
Is this with your 35mm Lunt? Can you describe or show how it is all connected / works etc?
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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Valery
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Re: C14 in solar imaging.

Post by Valery » Wed Jun 07, 2017 10:46 pm

marktownley wrote:
Wed Jun 07, 2017 3:11 pm
Valery wrote:
Wed Jun 07, 2017 1:54 pm
marktownley wrote:
Wed Jun 07, 2017 5:58 am
Interesting and nice images. Can you describe or show pictures of the etalon tuning method you are using? Maybe people will have some suggestions that can help.
Tilt tuning method.
Is this with your 35mm Lunt? Can you describe or show how it is all connected / works etc?
These images were taken in 2016 with my best PST etalon in it's native collimating and refocusing optics.
With the LS35 the difference will be in a 1,75x larger FOV in the case of collimation beam work
and in about 4x in the case of telecentric system. The Pressure Tuning will also allow a unifrom
scanning of the imaging object from blue wing to red wing of H-a. But this work needs a fair amount
of time to be completely finished and I am afraid it will be finished when the sun will becomes
spotless for months. :(

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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