Sergei Golyshev (AFK during workdays)
Laboratorium Solaris: Magnetism
ARs 2107, 2108, 2109 and 2010 along with other chromospheric features.
WARNING! Sun is dangerous, use proper filters for observing and imaging!
Aquisition time (start of the session) : JD2456847,70671296 (09.07.2014 09:48:21 MSK).
Image orientation: mirrored
Equipment:
QHY5L-II monochrome CMOS camera via 2x Barlow lens on Coronado PST riding Vixen SkyPod AZ goto mount.
Aperture 40 mm
Native focal length 400 mm
Effective focal length 800 mm
Tv = 1 ms
Av = f/20
ISO NA
Gain 20 out 1000 (SharpCap convention)
Exposures: about 65/100
Processing: movie was processed in Autostakkert!2. Resulting image was subjected to Richardson-Lucy deconvolution in AstraImage 3.0 (Cauchy type PSF, size 1 units, 8 iterations). Deconvolved images were stitched in Microsoft ICE.
High-pass filtering was made in Photoshop. Image was scaled down to 75% of original size to "tighten" the features and get the target value of 2,5 pixels per 3,5".
Note: I continue to think about why color cameras show better performance in solar imaging in H-alpha giving the possibility to capture prominences and the "surface" details in one exposure? My idea is that it's a result of in-camera de-Bayering process gone wrong. Green channel normally defines the overall luminostiy, but in monochromatic image, such is that is produced by H-alpha telescope there is no green and the luminocity (or should that be "luminance") is restored incorrectly to the benefit of the photographer, nonetheless :)
Laboratorium Solaris: Magnetism
ARs 2107, 2108, 2109 and 2010 along with other chromospheric features.
WARNING! Sun is dangerous, use proper filters for observing and imaging!
Aquisition time (start of the session) : JD2456847,70671296 (09.07.2014 09:48:21 MSK).
Image orientation: mirrored
Equipment:
QHY5L-II monochrome CMOS camera via 2x Barlow lens on Coronado PST riding Vixen SkyPod AZ goto mount.
Aperture 40 mm
Native focal length 400 mm
Effective focal length 800 mm
Tv = 1 ms
Av = f/20
ISO NA
Gain 20 out 1000 (SharpCap convention)
Exposures: about 65/100
Processing: movie was processed in Autostakkert!2. Resulting image was subjected to Richardson-Lucy deconvolution in AstraImage 3.0 (Cauchy type PSF, size 1 units, 8 iterations). Deconvolved images were stitched in Microsoft ICE.
High-pass filtering was made in Photoshop. Image was scaled down to 75% of original size to "tighten" the features and get the target value of 2,5 pixels per 3,5".
Note: I continue to think about why color cameras show better performance in solar imaging in H-alpha giving the possibility to capture prominences and the "surface" details in one exposure? My idea is that it's a result of in-camera de-Bayering process gone wrong. Green channel normally defines the overall luminostiy, but in monochromatic image, such is that is produced by H-alpha telescope there is no green and the luminocity (or should that be "luminance") is restored incorrectly to the benefit of the photographer, nonetheless :)