Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
- MalVeauX
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Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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:
Color:
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
Very best,
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:
Color:
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
Very best,
- marktownley
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
Nice results Marty!
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!
- Carbon60
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
Good images, Marty.
Stu
Stu
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
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
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.
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.
- Valery
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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
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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- ffellah
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
Thanks all,
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,
Hi Bart,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.
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,
- MalVeauX
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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.
Very best,
- MalVeauX
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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,
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
I think the 3 pane filament is absolutely lovely Marty
Alexandra
Alexandra
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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
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.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- MalVeauX
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
If someone would please cancel all this rain and bad weather, I'd be delighted to continue!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
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
Top Marty, this is indeed high resolution!
Great setup pics top.
Great setup pics top.
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
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
Earth Scale:
Very best,
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
Earth Scale:
Very best,
- MAURITS
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Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
A way very close to the sun's surface!
Lots of fine details
Lots of fine details