Close-up of sunspot and active region - July 4, 2006

Setup: Coronado SM60/BF10 H-alpha filter, Borg 100ED F6.4, IR reject filter, ToUcam web camera, Takahashi EM-10 mount (here's how this setup looks). Image scale: 1 arcsec/pixel.

Webcam settings: 1/1000 sec, 5 FPS, brightness=100%, gamma=10%, b&w mode=ON, 640x480 pixels, took two 60s sequences of overlapping fields

Processing: selected and stacked best 20 frames using K3CCDtools. Contrast enhanced, colorized, combined into 1x2 mosaic using PhotoshopCS.

This image was taken early in the morning from a site viewing the Sun over a large body of water to minimize air turbulence. Read more here.


Here's my main page where you can see more of the pictures I have taken so far.


Comments greatly appreciated! (mikael@leif.org)