Saturday, December 10, 2016

20161128 Sun

I don't know if this is the first time for me to use the ASI120mm, I had one before but sold shortly, this one was newly acquired.

First one taken with my Ranger with a reducer lens, 1245 (GMT+8):-

Second one with a 3x barlows, 2 frames mosaic... uneven illumination, long time no practice, taken at 1253 and 1255 (GMT+8).:-

After taking the images, I found that I didn't set the gain to zero and it was set at 50% which is very high.  No wonder why the result image is rather noisy.

I found no more Newton's ring even at 3x?

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