CaK, 03022019
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CaK, 03022019
This morning it was quite good for a couple of hours. Sun is still very low.
Two images:
100mm ED f/9 - Baader Blue - Baader K-Line - PST#1 - PST #1 - ASI290mm
Sun_123338_Gain=60(off)_Exposure=6.2ms_Gamma=73(off)42763_imppgPS by bart moors, on Flickr
And with a Baader VIP Barlow, focal length about f/13 - f/14
Sun_112218_Gain=191(off)_Exposure=6.4ms_Gamma=64(off)44678_imppgPS by bart moors, on Flickr
I experimented today with a telecentric imagetrain, but back to the drawing table. Way to much reflections, no clear image.
20190203_142315_resized by bart moors, on Flickr
Thanks for watching.
Two images:
100mm ED f/9 - Baader Blue - Baader K-Line - PST#1 - PST #1 - ASI290mm
Sun_123338_Gain=60(off)_Exposure=6.2ms_Gamma=73(off)42763_imppgPS by bart moors, on Flickr
And with a Baader VIP Barlow, focal length about f/13 - f/14
Sun_112218_Gain=191(off)_Exposure=6.4ms_Gamma=64(off)44678_imppgPS by bart moors, on Flickr
I experimented today with a telecentric imagetrain, but back to the drawing table. Way to much reflections, no clear image.
20190203_142315_resized by bart moors, on Flickr
Thanks for watching.
- MapleRidge
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Re: CaK, 03022019
Nicely detailed CaK images Bart...well done
Brian
Brian
Brian Colville
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Photos: https://www.flickr.com/photos/185395281@N08/albums
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Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
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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, 03022019
Thanks Brian! With CaK it is even more difficult to find the right processing techniques than with H-alpa. Hope I can practice a lot in the coming months.
- marktownley
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Re: CaK, 03022019
Good images and nice to see some experiments going on too!
http://brierleyhillsolar.blogspot.co.uk/
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Re: CaK, 03022019
Thanks guys!
It is interesting to try the imaging train with the telecentric, a Baader TZ-3. I think it is the same experiment Bob Yoesle is working on.
Total length of the train is 60 cm. First 14 cm are in the telescope to move the Baader Blue a bit further up the light cone. Distance from back lens TZ-3 to image plain is 24,5 cm. Train weighs about 1.120 gram.
Focal ratio with the Baader TZ-3 becomes f/27, so would use the Grasshopper instead of the ASI290mm. The ASI is more sensitive in blue than the Grasshopper, but the pixels are just too small.
To gather enough light, I think a focal reducer is probably necessary, but then the train becomes about 10-15 cm longer. Baader sells two interesting ones, a 0,4 and a 0,7 reducer. But never saw them on the secondhand market.
Build some other trains today, first one is where I use the Baader VIP before the PST filters. Curious if it will have any effect. Will be about f/18 so then I can use the ASI290MM.
It is interesting to try the imaging train with the telecentric, a Baader TZ-3. I think it is the same experiment Bob Yoesle is working on.
Total length of the train is 60 cm. First 14 cm are in the telescope to move the Baader Blue a bit further up the light cone. Distance from back lens TZ-3 to image plain is 24,5 cm. Train weighs about 1.120 gram.
Focal ratio with the Baader TZ-3 becomes f/27, so would use the Grasshopper instead of the ASI290mm. The ASI is more sensitive in blue than the Grasshopper, but the pixels are just too small.
To gather enough light, I think a focal reducer is probably necessary, but then the train becomes about 10-15 cm longer. Baader sells two interesting ones, a 0,4 and a 0,7 reducer. But never saw them on the secondhand market.
Build some other trains today, first one is where I use the Baader VIP before the PST filters. Curious if it will have any effect. Will be about f/18 so then I can use the ASI290MM.
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Re: CaK, 03022019
Absolutely lovely to see this new AR close up in CaK I don't think there are any spots sadly, it must be a decaying region.
Alexandra
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- Bob Yoesle
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Re: CaK, 03022019
Hi Bart,
Wonderful images!
The Baader 0.4 reducer is the "research grade" to mate with the TZ3 and restores the original f ratio / EFL of the system. Haven't had a chance to use it yet but looking forward to when the weather improves. Looks indeed like we're on the same path... The Chroma Tech CaK filter is supposed to work at the specified 0.1 nm in a collimated or telecentric system. When tilted it looks almost as good as a PST CaK at f9 (2.2 A) - so we will see what happens in a telecentric at ! f27. I will also be curious to see what the PST CaK filters do in the telecentric, but from your results (as well as my non-telecentric imaging) the reflection issues may have to be dealt with.
Again, great images.
Wonderful images!
The Baader 0.4 reducer is the "research grade" to mate with the TZ3 and restores the original f ratio / EFL of the system. Haven't had a chance to use it yet but looking forward to when the weather improves. Looks indeed like we're on the same path... The Chroma Tech CaK filter is supposed to work at the specified 0.1 nm in a collimated or telecentric system. When tilted it looks almost as good as a PST CaK at f9 (2.2 A) - so we will see what happens in a telecentric at ! f27. I will also be curious to see what the PST CaK filters do in the telecentric, but from your results (as well as my non-telecentric imaging) the reflection issues may have to be dealt with.
Again, great images.
Diagonally parked in a parallel universe.
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
Dark-Sky Defenders
Goldendale Observatory
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
Dark-Sky Defenders
Goldendale Observatory
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Re: CaK, 03022019
Thanks!
I read that Baader says that by using the 0,4 you can restore the original f ratio. But you would have to move the reducer a bit more back than the ideal position. Still doubting if I would go for the 0,7 or the 0,4. With the 0,7 it would be possible to achieve somewhere between f/17 - f/19. And that is about the ratio that seems to fit with the ASI290MM in CaK.
Reflections will be the biggest problem, next to the length of the train and the possible sagging. And then hopefully the effect on the PST filters is what we hope it is going to be.....
I read that Baader says that by using the 0,4 you can restore the original f ratio. But you would have to move the reducer a bit more back than the ideal position. Still doubting if I would go for the 0,7 or the 0,4. With the 0,7 it would be possible to achieve somewhere between f/17 - f/19. And that is about the ratio that seems to fit with the ASI290MM in CaK.
Reflections will be the biggest problem, next to the length of the train and the possible sagging. And then hopefully the effect on the PST filters is what we hope it is going to be.....
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Re: CaK, 03022019
I have the 0.7x reducer and it's a nice piece of kit.
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: CaK, 03022019
Yes, but quite expensive too. Just thought that first trying the Baader VIP to achieve f/18 and see how the ASI290 functions is the best idea before investing.
Or I could try the 2,5x power mate before the PST filters. Powermate with a T2 adapter, T2 extension and Skybender. 2,5x will go down to about 2x.
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Re: CaK, 03022019
Nicely done, Bart ! Is that the spicules layer ? If that is what it is, I do not believe I saw it before in CaK...
Franco
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Re: CaK, 03022019
Thanks Franco. Yes, that is the "double limb". But it has been done before: Mark and Bob for example have taken much better images of it.
Most of the the time CaK images are processed in such a way that this layer is hard to see in the final image.
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Re: CaK, 03022019
Top Ca-K images Bart, well done.
David
Kit: Skywatcher Evostar 120 on Celestron CG-4 / Bresser AR102xs / Lunt B1200 Ca-K Module / Lacerta Herschel Wedge / Daystar Combo Quark / ZWO ASI178MM & 120MC-S / QHY5-II Mono
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Re: CaK, 03022019
Very nice images, Bart. Looking forward to seeing more as the season progresses.
Stu.
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Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/