Mostly spicules from July 1

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gabrieli
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Mostly spicules from July 1

Post by gabrieli » Mon Jul 01, 2019 9:33 pm

The images below are from using an Aries ERF on a c9.25 + Televue2X + Quark Combo + Blackfly S(2.8 Mp). The efl was 4600mm.
Ther imaging session lasted from 12:30 pm to 1:15 pm, There wasn't much happening by way of surface or edge events.

Lou
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spicules+.jpg (499.92 KiB) Viewed 130 times
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spicules-c.jpg (983.78 KiB) Viewed 130 times
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380.jpg (1.25 MiB) Viewed 130 times
380-.jpg
380-.jpg (807.5 KiB) Viewed 130 times
712.jpg
712.jpg (932.82 KiB) Viewed 130 times

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Valery
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Re: Mostly spicules from July 1

Post by Valery » Tue Jul 02, 2019 3:41 am

Hi Lou,

Seems you have a good progress with aperture use. Spiculaes are well seen at the limb and on the disk.

However such a configuration works well to a some extend only. Working F/20 is too wide cone and does not allow the etalon to work close enough to it's native narrow bandwidth.
The best way to use your equipment at it's full potential you do need to have at least F/30 or better F/40 at the etalon and then use a focal reducer to reduce it to F/17-20 in the case your camera has a 4.5mc pixels.
F/20 to F/30 is good for faint prominences and F/30 to F/40 for surface details and spiculaes at the limb.

If your etalon 0.4A bandwidth native, then at F/40 it will has 0.44A bandwidth, at F/30 - 0.52A and at F/20 - 0.88A !


Valery
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Re: Mostly spicules from July 1

Post by marktownley » Tue Jul 02, 2019 4:43 am

These are nice shots Lou!
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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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Montana
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Re: Mostly spicules from July 1

Post by Montana » Tue Jul 02, 2019 9:14 am

Very clean spicule edge, very nice indeed :hamster: :bow

Alexandra

gabrieli
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Re: Mostly spicules from July 1

Post by gabrieli » Tue Jul 02, 2019 11:15 am

Thanks for the comments and views, Valery, Mark, and Alexandra and viewers.

Thanks for passing on your experience, Valery.
I’d like to use f/40 but the Televue 4x Powermate is too dark. Is there a “brighter” telecentric you could recommend? Is there a preferred 0.5X reducer to use in this case?

Lou

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Re: Mostly spicules from July 1

Post by MAURITS » Tue Jul 02, 2019 2:12 pm

Very niceley done Lou.
Regards,
Maurits

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