2018 March 01 Sun - AR12700
AR12670 is moving towards the W limb. Its activity is much subsided with a few sporadic flares. This group id reduced to a single sunspot.
With the tilting jig, much of the problem of fringes is solved. However, the tilt results in severe vignetting. I'll make another tilt-jig and place it closer to the cmos sensor and hope this may improve.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: ASI1600MM, 4656X3520 pixels (3.8 micron)
North is up, east is to the left.
2018 March 01 Sun - AR12700
2018 March 01 Sun - AR12700
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Re: 2018 March 01 Sun - AR12700
more images
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- AR12670-02_40_56Z.jpg (153.42 KiB) 已瀏覽 319 次
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