Quick closeup in Ca-k from today

[Dennis]

Hi,
the weather here is nothing but cloudy atm. I could manage a lucky shot between clouds and rain though. This active area is really something, hope for less clouds in the upcoming days.

Image was done without flatfield, stack of 100 images, gain 42, 5ms exposures and the imx432 camera.

Thanks for looking and cs.
Dennis

[ffellah]

Excellent Calcium image you were able to take, Dennis. It is definitely a very complex and beautiful active area.

Franco

[Davidm]

Wow, lovely image Dennis.

[WMoore]

Very nice capture. Definitely a lot going on it that region.
Stared at that for a while, it's beautiful. Thanks for sharing!

Wayne

[arnedanielsen]

Excellent closeup, Dennis!

[Dennis]

Thanks guys, and here is another one that came out not too bad.

[christian viladrich]

Hi Denis,

Just wondering whether your could try a respaced 150 mm refractor, just like Alfred did. This would significantly increase the resolution of your Ca K images.

The C9.25 is the best version of SC for blue light. Still, it is not diffraction limited at 393 nm. There is no doubt about it.
http://astrosurf.com/viladrich/astro/in ... Strelh.jpg

You will be much happier with a respaced 150 mm refractor. I am just trying to help. This is your call ...

Clear skies,

Christian

[Alto]

Stunning. Sadly the weather misbehaved today - weather forecasts eh!

[xinghai]

interesting

[eroel]

Dennis:
Super CaK images.
Regards.
Eric.

[Dennis]

Thanks Alto, Xinghai and Eric.
Christian: Thanks for the input, i will consider it.

[rsfoto]

Very good and interesting image

[KMH]

Those are both beautiful images. The narrow band Ca K is really interesting.

Kevin

[marktownley]

These are excellent Dennis, with the filters very much on band. Do you have the filters after the Barlow / telecentric?

[Dennis]

These are excellent Dennis, with the filters very much on band. Do you have the filters after the Barlow / telecentric?

Thanks Mark, yes they are close to the camera way after the apm 2.7 barlow.

[marktownley]

These are excellent Dennis, with the filters very much on band. Do you have the filters after the Barlow / telecentric?

Thanks Mark, yes they are close to the camera way after the apm 2.7 barlow.

I thought the bandwidth looked tighter than at a 'native' focal length

[cybermayberry]

Excellent image

[yltansg]

Hi Dennis,

Both are great CAK images!! Looking forward to see even greater ones when better weather arrives.

Alfred

[DeepSolar64]

Dennis,
The plasma looks really turbulent in your images. It reminds me of the dark turbulent clouds that often precede a thunderstorm.

Very nice.

James.

[DavidP]

These are aesthetically gorgeous images Dennis.
AR2615 has been amazing

[Dennis]

And another one from today

[rigel123]

Gorgeous Dennis, like a river of molten lava!

[Dennis]

Gorgeous Dennis, like a river of molten lava!

Thanks Warren, these are my first tries with these filters and there is still a lot to optimize. Mainly reflections and also have to update scope collimation. I was lucky with some okish spring conditions. But lots of fun.

[marktownley]

Gorgeous Dennis, like a river of molten lava!

Thanks Warren, these are my first tries with these filters and there is still a lot to optimize. Mainly reflections and also have to update scope collimation. I was lucky with some okish spring conditions. But lots of fun.

See recent comments I have made to Alfred regards tilting.

If you have a reflection issue then the filter closest to the camera needs to be tilted to throw the reflection out of the field of view, only needs to be one or two degrees max.

Mark

[MAURITS]

Super Calcium close ups Dennis.

[Dennis]

Gorgeous Dennis, like a river of molten lava!

Thanks Warren, these are my first tries with these filters and there is still a lot to optimize. Mainly reflections and also have to update scope collimation. I was lucky with some okish spring conditions. But lots of fun.

See recent comments I have made to Alfred regards tilting.

If you have a reflection issue then the filter closest to the camera needs to be tilted to throw the reflection out of the field of view, only needs to be one or two degrees max.

Mark

Thanks Mark, i will try that.

[Rob63]

Lovely set of images Dennis, they capture the dynamic nature of this AR beautifully.

[ffellah]

All fantastic captures, Dennis

Franco