Faculae on limb (20-07-2016)

Date of image 20/07/2016

Equipment: SW Skymax 150 (f12) at prime focus with a home-made Baader solar film filter (full aperture). The telescope was mounted on an EQ5 pro. Camera: Canon 550D in 640x480 movie crop mode set at 1/500s exposure ISO400, the frame rate was 60fps. 

I wanted to capture the same Faculae I shot yesterday to see how they progress in time. The weather was good, there may have been some think high level cloud but this did not effect the quality of the frames.

The total movie duration was about 5 minutes. The best 40% of frames were selected and decompressed by Pipp, Stacking and editing was done with RegiStax 6. I used about 20 alignment points. I think about 700 frames made it into the final stack. 

I did not ramp up the wavelets because I was getting ringing effects at the suns horizon. I also did not like the smoothen effect of the de-ringing feature in Registax. 

The telescope was tracking well.  Focusing was done by trial and error (by slowly tweaking the focus and watching 15 seconds of live view). I don't think the focus was as good as yesterdays shot. I am now thinking of attaching a scale onto the focus knob to fix the exact position of good focus.