Hi Phil,

Very good

Rainer

Hi,

The Sun came out two days earlier then expected and so here the Full discs in H-alpha and White light

Thanks for looking

Hi Phil,

I am not an expert in all those technical explanations but when comparing images I put them together in one image and compare.

Left side Double stack and right side Single stack.

What I see is that DS has more visible plague then SS

Hi Mark,

Very interesting.

Have you taken a look into their Gallery = https://www.kso.ac.at/downloads/airplanes.php

Hi Alexandra,

Very nice images. At first sight I wondered why is that Human just standing there until I read about him.

Superb discs Rainer! :hamster: :bow I see the faculae of cycle 24 AR, it is probably very weak so fizzling out. I have a new challenge for you now, polar faculae at the north and south pole are only visible during solar minimum. I see some nice bright points at the north of your WL image and some i...

Hi Mark,

Great shots. If one looks at the Magneotgram in SDO the polarity is according to cycle 25. negative / positive

Rainer

Hi Pedro,

Great images. The spot which is better visible in Ca K seems to be another from cycle 25 if it is compared to the magnetogram from SDO. It has a neg / pos polarity which correspods to the new polarity for the northern hemisphere

Hi Brian,

Very good and interesting your images.

Rainer

Hi Salvo,

Very nice images. Especially that faint prominence

Rainer

Hi,

A bit later here the White light image. The old cycle 24 spot is not very visible and perhaps due to the atmospheric conditions not being clear as usual.

Hi,

Just enough time to get a session of 9 Avi with just 250 frames each. Clouds > free > Clouds

While writing this trying to get 4 Avi in White light

Hi,

I just read this

https://www.skyandtelescope.com/astrono ... ankruptcy/

and this

https://www.telescope.com/assets/docume ... 1-2019.pdf

¿?¿?¿?

In my opinion Phil's images are better balanced and they better represent what is seen on the sun. They also consist more shades between the spiculaes (darkes bushes on the disk). Rainer's images looks too much contrasty - just like more wide etalons show in a telescope. The space between disk spic...

Hi,

Today it was even worse then yesterday.

So if would be nice if we could live in a place like the one that Rainer suggests.

¿ what do I need to move to the Atacama desert ?

Rainer: you are a magician ! You certainly are doing a magnificent job of full disks with the SM 60 double stacked. I wish I could do the same with my SM90 DS. The 90 is traditionally not easy to put in band due to the length of the scope: you need orangutan arms to tune the external etalon while y...

Hi Phil, Look at the image below where I took your histogram and how I changed it. Red lines is your original image histogram and green is how I stretched it a bit. Just as an idea how stretching the histogram can also influence what we see as sharpness = contrast. 20200115_125713_fd_cm_et_histogram...

Hi Phil, I hope you do not mind but I downloaded your B&W image and processed it a bit according to my taste. You have some residuals there in the histogram which makes your image a bit opaque as well as you can stretch it on the white side a bit more. OK, I have to be careful as monitor settings do...

Hi Phil, Looking at your images and my limited knowledge i would say you are very close to both best parameters. Not being able to look by myself into that due to now having the scope present it is also difficult ot judge. As you said with a few iterations one tries tog et closer to that and as I ca...

Hola Eric,

Muy bien, muy bien

saludos Rainer

Hi Jochen,

The weather conditions change daily and so will our images. I see it when I assemble my mosaics of the Sun.

We need to move to the Atacama desert in Chile ...

Rainer

Hi Rainer: very nice results in spite of the thin clouds. Are you still using the Daystar filter? If you are, which one ? Franco :bow Hi Franco, Sorry no. Both DayStar filters I bought in April 2018 has gone back to DayStar as both were blind. Everytime I read the word DayStar I get angry :lol: Tha...

Hi, High and thin clouds infront of the Sun but enough light so I thought to give it a try it and below the result. Sorry for the bad quality :oops: If yout ake a look at the SDO magnetogram image you can see in the northern hemisphere a cycle 24 and a cycle 25 spot. The most left one is cycle 25 :s...

Hi Salvo,

Very nice images

Rainer