Saturday, September 27, 2008

20080927 H-alpha Sun (15s only!)

I have only 15s of continuous sunshine today after waiting for around one hour, cloud keep floating around, and to get surface detail in H-alpha, we need relatively cloudless... we can have some thin cloud moving, and to average them out by stacking, but then it's still unavailable today except this 15s. For prominences shot, I can push the exposure to pass through the thin cloud.

Telescope: Borg 45ED II
Filter: Coronado Solarmax 40 with BF10
Camera: DMK 31AF03

1336 (GMT+8), that 15s shot:-

1337 (GMT+8), exposure pushed to pass through the cloud:-

These two shots were taken with windows closed... so the glass is a killer of the quality, too... but for this kind of sky, don't worry.

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