4th August Solar activity

[John W]

4th August .. Very poor seeing conditions again today (lots of wind and cloud). I did the best I could and managed to get three different images (one at 540 nm to show the sunspots and two at Ha wavelength). All single exposures with a Canon 550d camera. Compare these with my images of 3rd August to see changes in the large prominence on the NE limb. Thanks for viewing.

[Averton]

Great images again John! Thanks for sharing them as we just didn't want to risk our equipment in the winds today.

[Stonius]

Nice pics! Can I ask - if you're using an etalon to view the prominence, do you remove it to view the 540nm? What sort of filter do you use to get 540nm? Is it a full aperture filter or...? Sorry, I don't know much about the mechanics of solar observing.


Markus

[John W]

Reply to Markus, I use two different scopes - a 81 mm WO refractor with a herschel wedge and 2" Baader continuum filter for the 540 nm shots (sunspots) and a Lunt 100 solar scope for the H alpha shots. Cheers John W.

[RichardJ]

Hi John,

Great shots despite the conditions.

Richard