March 2nd, 2024 WL FD, Sun Halo & 850nm IR Shot

[alashahin]

Today's morning was dominated by high clouds and mediocre seeing, so decided to play with some surplus filters.

Sun Halo & Plane Trail: The plane itself missed the sun disk but its trail drifted across the disk minutes after (see below).

2024.03.02 Morning.jpg (1.22 MiB) Viewed 353 times

White Light Full Disk: Lomo 80mm F7.5 Apo (masked to 42mm), Baader Herschel Wedge, ND1.8, Midopt BN470 (470/45nm), Player One Apollo-M MINI (IMX429), exposure 0.18ms, gain 0, 200 frames stacked, Drizzle 1.5x

2024.03.02 WL FD.jpg (1.6 MiB) Viewed 353 times

Sun in 850nm IR Full Disk: Lomo 80mm F7.5 Apo (masked to 42mm), Baader Herschel Wedge, ND1.8, Edmund (850/10nm), Player One Apollo-M MINI (IMX429), exposure 6ms, gain 0, single frame from SER video

2024.03.02 850nm IR Color.jpg (2.47 MiB) Viewed 314 times

Sun in 850nm IR Crop: Same as above.

2024.03.02 850nm IR Mono HD.jpg (622.44 KiB) Viewed 353 times

[marktownley]

Nice captures, thanks!

[christian viladrich]

The 850 nm is very interesting since it shows plages accross the solar disk, a bit as a very low contrast Ca II IR filter.
Well done !

It would be interesting to compare this 850 nm filter to a G-band filter or a 393-3 nm (if you have one of these filters).

Thanks for sharing !

[rigel123]

Very nice! 3590 looks like a depression on the West Limb!

[arnedanielsen]

Nice results!

[DeepSolar64]

Ala,

These are interesting IR shots. They remind me a bit of Gband or wide-bandwidth K line in the fact they can show faculae well inward of the limb. I hope you image with this filter more often. 850nm is not a common wavelength used.

You have a beautiful garden too!!

James

[rsfoto]

Great images and you are really imaging under tough conditions. Well done

[alashahin]

Thanks all for your kind comments and feedback; appreciated.

[alashahin]

The 850 nm is very interesting since it shows plages accross the solar disk, a bit as a very low contrast Ca II IR filter.
Well done !

It would be interesting to compare this 850 nm filter to a G-band filter or a 393-3 nm (if you have one of these filters).

Thanks for sharing !

Thanks Christian for your remarks. I have done some comparisons the day after: viewtopic.php?t=44198

[MAURITS]

Well done.