2018 May 12 Sun - filaments
Outside the AR's, only a few filaments are visible, notably near the Se and S limb.
As the slow motion is still unavailable, I have to continue with push or pull the telescope to put the image in field. This task becomes very tedious when working on close-up imaging, and I have to use very short exposures (thus high gain) to avoid blur images.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 80 mm (f/17.5) 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), binned 2
North is up, east is to the left.
2018 May 12 Sun - filaments
2018 May 12 Sun - filaments
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- filament-S-03_21_54Z_cr.jpg (45.18 KiB) 已瀏覽 252 次
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- filament-S-03_22_11Z_cr.jpg (23.58 KiB) 已瀏覽 252 次
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- filament-S-03_37_10Z_cr.jpg (47.95 KiB) 已瀏覽 252 次
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- filament-S-03_37_22Z_cr.jpg (26.23 KiB) 已瀏覽 252 次
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- filament-S-03_37_29Z_cr.jpg (21.95 KiB) 已瀏覽 252 次
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- filament-SSE-03_05_41Z_cr.jpg (41.8 KiB) 已瀏覽 252 次
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- filament-SSE-03_22_11Z_cr.jpg (46.68 KiB) 已瀏覽 252 次
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- filament-SSE-03_37_22Z_cr.jpg (46.7 KiB) 已瀏覽 252 次
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- filament-SSE-03_37_29Z_cr.jpg (44.18 KiB) 已瀏覽 252 次
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