Sun (spot) 21 Nov 2013

[lqx]

Finally picked up a mono webcam after months of procrastination!
Skies had been cloudy/rainy for the past week so I had to test with marginally clear skies yesterday!

Sharing a section of the sun with the huge sunspot which was visible yesterday!
My second attempt at processing on the sun, any feedback/suggestions most welcome!




Imaged using:
ASI 120mm, Tak TSA-102, SF-70 filter.


I seem to be getting Newtonian rings on my images, and flats didn't seem to remove it fully--in fact it made it worse (!!) on some subs!
Any suggestions from the shifus here?
I've seen some possible remedies in... (a) getting some sort of a camera tilt adaptor (hardware solution), (b) trying some FFT to diminish the periodic lines... (had trouble finding a suitable filter on photoshop CS6... might try other editing software next time!)

[bornfree]

nice.. looks like fish eye..

[Gary]

Nice shot! So much details! Keep shooting.

[yltansg]

Hi Qixiang,

Great job !! Very nice image I can't do it better.

Here is the full disk taken at close to 11 am on the same day.



And this is a BW close-up of AR1899

And this is a negative image of that long filament

Look forward to seeing more images from you

Alfred

[lqx]

Thanks Born, Gary, Alfred!

Nice images Alfred! That huge dark sunspot was super contrasty in the eyepiece and I was staring at it for a long long while!
Yes, that long filament too! Maybe we might see another nice burst like that little lizard/dragon filament the other time! =)

But it's somewhat in the middle of the disk facing Earth so......

[antares2063]

i feel its the biggest single sunspot seen so far! been looking at weekends thru a Baader film filter (when weather permits)