Dear friends,
A short session yesterday to grab FD images in H-Alpha and CaK.
FD image in H-Alpha using the Takahashi Sky-90II with Coronado 90mm/BF15, Coronado 2x CeMax and ASI 1600mm PRO
Full size image
FD image in CaK using William Optics ZenithStar 61II, Lunt Cak 1200 module ASI 178mm
Full size image
Full size image
Best regards,
Arne
Sun FD in H-Alpha and CaK 3rd of June 2021
- arnedanielsen
- Way More Fun to Share It!!
- Posts: 7285
- Joined: Fri Apr 18, 2014 10:42 pm
- Location: Vestby, Norway
- Has thanked: 6181 times
- Been thanked: 7142 times
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10247 times
- Contact:
Re: Sun FD in H-Alpha and CaK 3rd of June 2021
Nice shots Arne!
I have the same 60/f6 scope as you, stop it down to 40mm for CaK you will significantly improve the quality of the full disk. This scope full aperture at 393nm has a LOT of spherical aberration.
Mark
I have the same 60/f6 scope as you, stop it down to 40mm for CaK you will significantly improve the quality of the full disk. This scope full aperture at 393nm has a LOT of spherical aberration.
Mark
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- Montana
- Librarian
- Posts: 34563
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17672 times
- Been thanked: 8791 times
Re: Sun FD in H-Alpha and CaK 3rd of June 2021
Superb full discs Arne I agree with Mark, I have to stop down my TEC140 because of the spherical aberration too
Alexandra
Alexandra
- arnedanielsen
- Way More Fun to Share It!!
- Posts: 7285
- Joined: Fri Apr 18, 2014 10:42 pm
- Location: Vestby, Norway
- Has thanked: 6181 times
- Been thanked: 7142 times
Re: Sun FD in H-Alpha and CaK 3rd of June 2021
Thanks and thanks for the tip Mark! I will definitely try this.
Best regards,
Arne
Best regards,
Arne