Close up of a big dark filament. 280mm. Oct.18 2017

[Valery]

Hi all,

Today I have tested the 5-th (from the last batch) 295mm ARIES filter prior to
it's shipping to the customer.

The only interesting feature on the sun today was a large dark filament.
I took some exposures of it. Here are two of them separated by 36 min.
time gap.
If to look at these images with some attention, you can easily see some changes
in the filament itself as well as many changes in the spicules and thin fibrills.

Seeing was really bad most of the time. Telescope C11 280mm SCT, PST etalon Mod-2

Thanks for looking and comments.


Valery

[Carbon60]

Good images, Valery. Nice contrasty filament with plenty of spicule detail behind.

Stu.

[Montana]

Certainly some changes between the two, very nice indeed
Alexandra

[ffellah]

Very nice close-up, Valery

Franco

[allhoest]

Impressive.

CS
Alex

[Bruce Girrell]

Quite a bit of action actually.
I sometimes compare images by viewing them side by side, letting my eyes slide the images together, as you would view a stereopair (this works great for those "what's different between these pictures" puzzles). Anything that has moved between the images will perceived as being displaced from the image plane. For these two images, there is a lot of displacement throughout the image, but especially near the large filament.

Nice shots

[Valery]

Thanks for this note, Bruce. Sometime I doing the same. This given pair is a bit too far in the time and the changes are larger than I would like to see. Still useable.

I cropped these images and if to place them horizontally on some space between and then cross the eyes, we can see some "3-D relief".


Valery

[marktownley]

Great detail Valery!