Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

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MalVeauX
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Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Hey all,

I managed to get some time in this morning and gathered some decent data. I played around with configurations and settled with something that I felt worked well enough to at least use for the day. I added some space between my 0.5x focal reducer (2") and the IMX174 sensor, this reduced the image scale and had minimal vignetting (I estimate I lost 10~15% of the FOV to vignetting and distortion perhaps). I'm not sure what the actual reduction is at this point. I know it's not 0.5x, but maybe it's more like 0.6x or 0.7x due to proximity? I can't be sure. So I'm not sure if I'm at F25 or F30 or what. I'm at F42 (+/- 1~2 due to imaging train) and then focal reducing by something like 0.6~0.7x or so. It's still a large imaging scale based on FOV from what I experienced today. Maybe even 0.8x? I'm just not sure. But I had enough transmission and good enough seeing to work with it. The filament and plage region is a 3 image mosaic.

B&W:

Image

Image

Image

Image

Color:

Image

Image

Image

Image

Equipment:

C8 Edge HD SCT
Aires 214mm Tri-Band D-ERF
Baader UV/IR Block Filter
Quark Chromosphere
PST Etalon
ST80 (masked to 60mm) Refractor
ASI174MM + 0.5x Focal Reducer
Solarsetup_02232019.jpg
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FullDisc_ScreenShot_02232019.jpg
FullDisc_ScreenShot_02232019.jpg (71.47 KiB) Viewed 1947 times
C8_DS_ScreenShot_02232019.jpg
C8_DS_ScreenShot_02232019.jpg (81.06 KiB) Viewed 1947 times
Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by marktownley »

Nice results Marty!


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: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by Carbon60 »

Good images, Marty.

Stu


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
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More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by bart1805 »

Hi Marty,
Just image with the normal focal length, by using only the PST etalon. Than image with whatever train you like. Make layers in PS and see how much you have to enlarge the f/10 image. Than you know exactly the f-ratio of your train.
What is happening to the right of the image? It is also visible on the picture of the computer screen.
CS! Bart.


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by Valery »

Hi Marty,

Nice series of images. High res image of the filament is truly excellent.

I glad my DERF works fine for you.


Regards,

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: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by Davidm »

Great detail in those shots!


Lunt LS152T (DSII and CaK module), Coronado Helios 1, Grasshopper 3 2/3" CCD
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by ffellah »

Excellent images Marty

Franco


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Thanks all, :bow
bart1805 wrote: Sun Feb 24, 2019 8:06 am Hi Marty,
Just image with the normal focal length, by using only the PST etalon. Than image with whatever train you like. Make layers in PS and see how much you have to enlarge the f/10 image. Than you know exactly the f-ratio of your train.
What is happening to the right of the image? It is also visible on the picture of the computer screen.
CS! Bart.
Hi Bart,

It's a mosaic of 3 images. The right edges were a little too close to the focal reducer's point of distortion and vignetting. I tried to get rid of some gradient but wasn't able to get rid of all of it without spending tons of time on it, so I left it as is since it's not the main features I was looking at (the filaments).

Good point about measuring via the PST etalon. It currently doesn't have any collimating lenses in it, just naked etalon after a Quark. I wonder if I would have enough focus range to even use the PST etalon with my C8 Edge, I know they're funky when it comes to focus distances.

Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Valery wrote: Sun Feb 24, 2019 10:35 am I glad my DERF works fine for you.
:bow Thanks, the D-ERF is exquisite and the holding cell from TeleskopService is also exquisite. Wonderful match. Does the job really well. Can't wait to add some CaK to the system.
X10S1144-copy.jpg
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X10S1132-copy.jpg (44.46 KiB) Viewed 1910 times
Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Rats, the filament is totally gone today! Not 13 hours later, it's totally gone leaving a mere plage and that's it. Bleh. I was hoping it would round the limb as a prominence.

Anyone see if it lifted off or if it just reabsorbed?

Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by Montana »

I think the 3 pane filament is absolutely lovely Marty :bow

Alexandra


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by Valery »

Marty, I am impressed with your setup pictures. Very compact and powerful solar telescope. Several times cheaper than Lunt 230THa and also more universal.

Looking for new activity and your images.

BTW. I received two inquires for the 8" ARIES filters right after your first series of photos with this setup.
They both would like to be ready for a warm season with new large solar telescope.


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: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Valery wrote: Tue Feb 26, 2019 10:24 am Marty, I am impressed with your setup pictures. Very compact and powerful solar telescope. Several times cheaper than Lunt 230THa and also more universal.

Looking for new activity and your images.

BTW. I received two inquires for the 8" ARIES filters right after your first series of photos with this setup.
They both would like to be ready for a warm season with new large solar telescope.


Valery
If someone would please cancel all this rain and bad weather, I'd be delighted to continue! :lol:

I'm still trying to figure out optimal configuration with the Quark & PST etalon. Lastest results were ok, but they were late day with poor seeing. I'm hoping to get some time in the mornings with better seeing. I have my Edge 0.7x focal reducer now so I can test different ways to configure the imaging scale, trying to find the optimal way to sit at F20 or so, with minimal to no vignetting. I also want to experiment with lower histogram fills and reduce gain use (the idea being... if I'm stacking 180~360 frames which is my norm with this setup, I should be fine with histogram fills of 30~50% and simply adjusting the histogram after the stack as needed to reduce gain noise). I'm just not sure how much cleaner it will be, but will test and post.

Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MAURITS »

Top Marty, this is indeed high resolution!
Great setup pics top.


Regards,
Maurits

Vista del Cielo Observatory

www.vistadelcielo.be
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MalVeauX »

Heya,

I got a small window this morning to try and see some features and test out some things and get some imaging time, but really didn't get much time. Lots of clouds rolled in, I barely could get anything with poor seeing with all the stormy cloudy mess moving through and then it was clouded over completely and some rain. Alas. I managed to get just enough time with a small window of ok seeing on the limb with the brightest group of spicules and a small prominence to inspect the limb.

I tried the 0.7x Edge Reducer -> SCT Crayford focuser -> Quark -> PST Etalon -> 0.5x Focal Reducer -> ASI174MM

Image

Image

Image

Image

Earth Scale:
EarthScale01.jpg
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Very best,


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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Post by MAURITS »

A way very close to the sun's surface!
Lots of fine details :D


Regards,
Maurits

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