Celestron fun again 6th May and boat solar transit

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Montana
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Celestron fun again 6th May and boat solar transit

Post by Montana »

More fun today, this time with the 3x Barlow. This is my best with the Contiuum filter

ImageSun_084254_06_05_2018_ green best by Alexandra Hart, on Flickr

I then tried a 685nm filter (as suggested by Christian and Valery). The seeing is less choppy but the exposure time is 3x longer and the contrast less easy to see for focus. So I am not sure I really like it.

ImageSun_082146_06_05_2018_ red best by Alexandra Hart, on Flickr

at 2x there is a strange reflection too

ImageSun_081443_06_05_2018_ red 2x by Alexandra Hart, on Flickr

I then tried the Baader K-line, that was awful! I am still not convinced this filter is clear as I have never been able to focus anything through it. I am also not convinced you see anything different through it anyway :?

ImageSun_093013_06_05_2018_ blue best by Alexandra Hart, on Flickr

Just when I was packing up near lunchtime I discovered on Spaceweather that there was a tiny spot group, so I went back and tried in Continuum in poor seeing at that time.

ImageSun_101923_06_05_2018_green best by Alexandra Hart, on Flickr

and just for fun and colour here are some pictures from my holiday of a boat transiting the Sun :lol:

ImageSunset boat transit by Alexandra Hart, on Flickr

ImageSunset boat transit by Alexandra Hart, on Flickr

ImageSunset boat transit by Alexandra Hart, on Flickr

Alexandra


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Re: Celestron fun again 6th May and boat solar transit

Post by Valery »

Hell Alexandra,

Nice to see your high res images with C11 scope.

Granulation is near perfect and I especially like the image of the spots.

BTW. To make imaging at red light easier, make a gamma setting to a lower value (high contrast).


Valery


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Re: Celestron fun again 6th May and boat solar transit

Post by christian viladrich »

Nice granulation images again Alexandra. It seems you have some very good seeing !
The K-line is no good for the Celestron SC. The spherical aberration is to large in the near UV.
Have you seen the green flash ?


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Re: Celestron fun again 6th May and boat solar transit

Post by rsfoto »

Hi Alexandra,

NIce images. I see you are having fun with your C11 and white light


regards Rainer

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Re: Celestron fun again 6th May and boat solar transit

Post by Derek Klepp »

Good catch with the boat transit.That WL is great to see.I,ve never thought muck of that CaK filter.I’ll leave that typo seems somewhat appropriate.
Derek


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Re: Celestron fun again 6th May and boat solar transit

Post by ffellah »

All great images, Alexandra ! My favorites are the last of the granulation series and the boat transit.

Franco


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Re: Celestron fun again 6th May and boat solar transit

Post by krakatoa1883 »

Great granulation image, Alexandra, the Continuum filter seems to be the best for your setup.

I had the same reflection problem with my 150 mm achromat. It occured on an air/glass surface of the Barlow lens when using the photo grade Astrosolar, never seen with the Herschel prisms or the visual grade.


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Re: Celestron fun again 6th May and boat solar transit

Post by marktownley »

The continuum image works the best there Alexandra.


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