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Today's Filament in High Res 200mm & Full Disc in 6562.8A | Feb 23rd 2019

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Hey all,

I managed to get some time in this morning and gathered some decent data. I played around with configurations and settled with something that I felt worked well enough to at least use for the day. I added some space between my 0.5x focal reducer (2") and the IMX174 sensor, this reduced the image scale and had minimal vignetting (I estimate I lost 10~15% of the FOV to vignetting and distortion perhaps). I'm not sure what the actual reduction is at this point. I know it's not 0.5x, but maybe it's more like 0.6x or 0.7x due to proximity? I can't be sure. So I'm not sure if I'm at F25 or F30 or what. I'm at F42 (+/- 1~2 due to imaging train) and then focal reducing by something like 0.6~0.7x or so. It's still a large imaging scale based on FOV from what I experienced today. Maybe even 0.8x? I'm just not sure. But I had enough transmission and good enough seeing to work with it. The filament and plage high res image is a mosaic of 3 images.












C8 Edge HD SCT
Aires 214mm Tri-Band D-ERF
Baader UV/IR Block Filter
Quark Chromosphere
PST Etalon
ST80 (masked to 60mm) Refractor
ASI174MM + 0.5x Focal Reducer




Very best,

Edited by MalVeauX
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