CaK Saturday 24th August
- Montana
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CaK Saturday 24th August
Well, lovely weekend so far. We saw this 2 weeks ago on the Jetstream forecast and they were right, the Jetstream has moved north and we have good weather
We had already booked tickets for the Churnet Valley Heritage Steam Railway for my birthday treat so as it was clear first thing I was out at the crack of dawn with the C11 (well I was ready for 9am when the Sun appeared in my garden).
I am not sure whether the seeing was good or bad as I have no reference but after 10 captures I only had one which was half decent. I had to stop the C11 down to 18cm as that seems the point where spherical aberration is removed and contrast appears and focus is possible. I also used the 2x Barlow as anything more was daft. I learned a lot.
I processed one with AstraImage and the same picture with ImPPG and they seem pretty similar to me.
Sun_075928_24_08_2019_AA1 f colour by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_AA1 a by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_imp f colour by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_imp a by Alexandra Hart, on Flickr
First two are AstraImage, the second two are ImPPG. I am sure seeing wasn't as good as it could be but you never know until I have done at least 10 try outs.
C11 stopped to 18cm / Lunt CaK wedge / Aries ERF / 2x Barlow / ZWO ASI174
I then packed away and hurried off to catch the 11:02 train Alexandra
We had already booked tickets for the Churnet Valley Heritage Steam Railway for my birthday treat so as it was clear first thing I was out at the crack of dawn with the C11 (well I was ready for 9am when the Sun appeared in my garden).
I am not sure whether the seeing was good or bad as I have no reference but after 10 captures I only had one which was half decent. I had to stop the C11 down to 18cm as that seems the point where spherical aberration is removed and contrast appears and focus is possible. I also used the 2x Barlow as anything more was daft. I learned a lot.
I processed one with AstraImage and the same picture with ImPPG and they seem pretty similar to me.
Sun_075928_24_08_2019_AA1 f colour by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_AA1 a by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_imp f colour by Alexandra Hart, on Flickr
Sun_075928_24_08_2019_imp a by Alexandra Hart, on Flickr
First two are AstraImage, the second two are ImPPG. I am sure seeing wasn't as good as it could be but you never know until I have done at least 10 try outs.
C11 stopped to 18cm / Lunt CaK wedge / Aries ERF / 2x Barlow / ZWO ASI174
I then packed away and hurried off to catch the 11:02 train Alexandra
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Re: CaK Saturday 24th August
Happy Birthday, Alexandra. A lovely day out
I can’t see any difference between process methods either. Nice images.
Stu.
I can’t see any difference between process methods either. Nice images.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- marktownley
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Re: CaK Saturday 24th August
Both are great captures! Like Stu says there's no obvious difference between the 2 processing software, I guess stick with the easiest. What sort of exposure time were you using for the images above?
Happy birthday btw! Churnet Valley looks like fun.
Happy birthday btw! Churnet Valley looks like fun.
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: CaK Saturday 24th August
Thanks guys, been out again this morning trying to do a prominence animation.
Mark the exposure Shutter=5.789ms
Alexandra
Mark the exposure Shutter=5.789ms
Alexandra
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Re: CaK Saturday 24th August
Hi Alexandra...
The CaK images look great and both processing methods look very similar to me. Well done
Happy Birthday, and the hertiage train looks to be a wonderful way to spend it too!
Brian
The CaK images look great and both processing methods look very similar to me. Well done
Happy Birthday, and the hertiage train looks to be a wonderful way to spend it too!
Brian
Brian Colville
Maple Ridge Observatory
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Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM
2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
Maple Ridge Observatory
Cambray, ON Canada
Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM
2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
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Re: CaK Saturday 24th August
Hi Alexandra,
Wow!! Congrats!! Is this your first light with the Lunt CaK wedge?
I have all items (ARIES D-ERF, C11, Lunt CaK wedge, ASI174 camera) but I am not sure if I can get great CAK images like yours.
Alfred
Wow!! Congrats!! Is this your first light with the Lunt CaK wedge?
I have all items (ARIES D-ERF, C11, Lunt CaK wedge, ASI174 camera) but I am not sure if I can get great CAK images like yours.
Alfred
- Montana
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Re: CaK Saturday 24th August
Thanks guys, yes this is my first light with the Aries ERF and the repaired Lunt CaK wedge. My first try out so I know I can do better I look forward to some spots as trying to focus on a blank background is hard. I also need to get my head around a PST modification, no money for that yet though.
Alex my exposure with the ASI174 was 5.789ms
Alexandra
Alex my exposure with the ASI174 was 5.789ms
Alexandra
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Re: CaK Saturday 24th August
Good enough starting result.Montana wrote: ↑Mon Aug 26, 2019 8:41 pm Thanks guys, yes this is my first light with the Aries ERF and the repaired Lunt CaK wedge. My first try out so I know I can do better I look forward to some spots as trying to focus on a blank background is hard. I also need to get my head around a PST modification, no money for that yet though.
Alex my exposure with the ASI174 was 5.789ms
Alexandra
You should not go below 230mm aperture stop. Anything below this will cause contrast loss for details due to central obstruction too high influence.
With 230mm aperture your scope will work at 0,74 Strehl ratio at 393nm. With R-L deconvolution the images will be very close to what can be achieved with Strehl 1.0
Valery
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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.
- Valery
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Re: CaK Saturday 24th August
Do your imaging in the CaK in a proper time (early morning) with aperture stop 230-240mm and you will have all chances to get excellent images.
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.