Live Solar granulation !
Taken by Sylvain Weiller on May 14, 2017 @
Jerusalem, Israel
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable
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Details:
This is how looks the surface of the Sun at high resolution during rather rare very good seeing (SSSMon best seeing =0.49) in near IR (720 nm) ! What is shown in the video* is a very small part - moreover slightly reduced size - of the FOV of the ASI 174MM sensor as the original full size movie for 20s recording is ~2.2 GB !). Please click on the video to see it only at 100% ! Now for processing the original movie to a still picture it has been first contrasted in SER-Player (gamma 0.10 & gain 145), registered in AS!3 (AP size 104), sharpened with 25% blend RAW, then Wavelets in RegiStax6 (020-100-318).
Setup : Meade 10" Classic with front aperture Baader D3.8 filter, SSM = Solar Scintillation Monitor, 3x 1" 1/4 Televue barlow FL~7500mm), Near IR chinese 720 nm filter fitted with special ring, ZWO ASI 174MM B&W camera, JMI motorized focuser. FireCapture 2.5, 8 bit SER, 51 avg. FPS, shutter 3.5 ms, gain 50 (12%), gamma 1, histogramm =71%, time Mid = 052037 UT . * PIPP GIF conversion used parameters : Neural-Net Quantisation Algorithm, Smaller file size, unchanged Border tolerance 5, Transparent pixel tolerance unchecked, reduced Color table bit Depth 6, lossy compression level 20, resulting GIF size 4975 KB).
Photographer's website:
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