Thursday, March 19, 2009

20090319 Sun

Again using my C5/PST setup, cloudy today so that I've to use autoexposure to track the cloud's thickness variation. Seeing poor at 2/10, transparency also 1/10. Low activity today.

1555 (GMT+8), this one is very dim as you could see from this image, I've overexposed many things (blacken) in order to bring this one out. Due to the poor transparency, noise is getting high:-

1603 (GMT+8), the etalon is performing very well now, the amount of surface detail and the uniformity both improved, even a small active region like this one shows up very nicely, this shot is taken with autoexposure so that the software changes it exposure to adapt to the varying thickness cloud. Slightly down sized to hide the noise:-

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