Full Disk Hydrogen Alpha Sun
[H-alpha Sun 09/18/05]
NOTES
DATE:
Sunday, September 18, 2005
TIME:
3:28 - 3:30 pm EDT
CAMERA:
Canon EOS 300D Digital Rebel
EXPOSURE: 1/160 second @ ISO 200 (disk) / 1/160 second @ ISO 800 (limb)
LOCATION:
Kalamazoo Township (my backyard)
INSTRUMENT:
Tele Vue Pronto w/ Coronado SolarMax 40 BF-10 & Meade 2x Barlow Lens
PROCESSING:
Split red band with Adobe Photoshop 7.  Aligned 4 of 9 disk images and 9 of 9 prominence images with RegiStax 3.  Wavelet filters adjusted to 1, 5, 10, 5, 3, 1.  Gaussian adjusted to 0.12 and Step to 0.02. Gamma adjusted to 0.50 (disk only).  Unsharp masking (Amount = 90%, Radius:  1.0 pixels).  Colorized with Photoshop (shadows: +77, +14, -73 / midtones:  +69, -15, -8).
COMMENTS:
I also shot a white light image of the Sun on the same date.  It's interesting to compare the two and see the differences in similar features such as the sunspots and faculae visible on September 18.