Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Kenny on Apr 01, 2015, 11:37:40

Title: The Sun
Post by: Kenny on Apr 01, 2015, 11:37:40
DSLR single exposure from Orpington of the Sun between clouds on a very windy day today showing AR2305 as it disappears off the right edge of the Sun. Minor adjustment to curve and cropped in Photoshop CS2. Canon 450D, Sigma DC 18-200mm lens. 1/500th second at 200mm, f/10, ISO-100.

(https://farm9.staticflickr.com/8751/16998484775_e037f1a329_o.jpg) (https://flic.kr/p/rU6FiH)

Just goes to show what you can do with a DSLR and Baader AstroSolar safety film. I must confess, it was more interesting looking when the Moon was passing in front of it. :)
Title: Re: The Sun
Post by: Kenny on Apr 01, 2015, 11:38:16
p.s. side by side comparison of the Sun (today) and the Moon (yesterday) through the same camera and lens at 200mm....
(https://farm9.staticflickr.com/8751/16998484775_e037f1a329_o.jpg) (https://flic.kr/p/rU6FiH) (https://farm8.staticflickr.com/7650/16993474171_35a9d43ca5_o.jpg) (https://flic.kr/p/rTDZPZ)
Title: Re: The Sun
Post by: Carole on Apr 01, 2015, 18:53:30
Nice Sun Kenny, the Moon looks a little out of focus.

Carole
Title: Re: The Sun
Post by: Kenny on Apr 01, 2015, 22:57:17
Perhaps a tad. Looks fine on my monitor. You can tell it's only 200mm zoom and cropped though. The granularity gets worse if you zoom in any further.
Title: Re: The Sun
Post by: Kenny on Apr 05, 2015, 16:39:04
Another single DSLR exposure of the Sun through my homemade Baader AstroSolar filter showing Sun spot group / Active Region AR2320. Caught between breaks in the clouds. With a bit of weather dancing I might be able to monitor this across a few days. Canon 450D at 200mm, 1/500th sec, f/10, ISO-100.

(https://farm8.staticflickr.com/7655/16422554383_6118566986_o.jpg) (https://flic.kr/p/r2cTgn)