Sergei Golyshev (AFK during workdays)
Laboratorium Solaris: filamentous Sun
Lots of filaments today... They are of two types - thin and relatively short, with crisp outlines, or large and more cloud-like.
WARNING! Sun is dangerous, use proper filters for observing and imaging!
Aquisition time (start of the session) : JD2456745,89619213 (29.03.3014 13:30:31 MSK - this is my local noon time, highest elevation of the Sun above horizont).
Image orientation: totally scrambled
Equipment:
Canon EOS 60D (unmodded) coupled to Coronado PST via Baader Planetarium Hyperion Zoom 8-24 mm Mark III click-stop system eyepiece and Baader Planetarium M43-to-T2 conversion ring and mounted on SkyWatcher NEQ-6 PRo mount.
Aperture 40 mm
Native focal length 400 mm
Projection zoom setting: 16 mm
Effective focal length 900++ mm
Tv = 1/10 seconds
Av (effective) = NA
ISO 400
Exposures: 75% of 54
Processing: images were converted to monochrome and exported as 8-bit .TIFFs. Images were assembled into stack in ImageJ and saved as .AVI. AVI was processed in Autostakkert!2.
Resulting image was subjected to Richardson-Lucy deconvolution in AstraImage 3.0 (Cauchy type PSF, size 2,1 units, 8 iterations).
High-pass filtering and no coloration made in Photoshop.
Finally, Image was scaled down to have Solar disk diameter about 1500 pix.
Notes: tracking is good! 1/10th of second @ISO400 is much better than 1/50th @ISO1000.
Laboratorium Solaris: filamentous Sun
Lots of filaments today... They are of two types - thin and relatively short, with crisp outlines, or large and more cloud-like.
WARNING! Sun is dangerous, use proper filters for observing and imaging!
Aquisition time (start of the session) : JD2456745,89619213 (29.03.3014 13:30:31 MSK - this is my local noon time, highest elevation of the Sun above horizont).
Image orientation: totally scrambled
Equipment:
Canon EOS 60D (unmodded) coupled to Coronado PST via Baader Planetarium Hyperion Zoom 8-24 mm Mark III click-stop system eyepiece and Baader Planetarium M43-to-T2 conversion ring and mounted on SkyWatcher NEQ-6 PRo mount.
Aperture 40 mm
Native focal length 400 mm
Projection zoom setting: 16 mm
Effective focal length 900++ mm
Tv = 1/10 seconds
Av (effective) = NA
ISO 400
Exposures: 75% of 54
Processing: images were converted to monochrome and exported as 8-bit .TIFFs. Images were assembled into stack in ImageJ and saved as .AVI. AVI was processed in Autostakkert!2.
Resulting image was subjected to Richardson-Lucy deconvolution in AstraImage 3.0 (Cauchy type PSF, size 2,1 units, 8 iterations).
High-pass filtering and no coloration made in Photoshop.
Finally, Image was scaled down to have Solar disk diameter about 1500 pix.
Notes: tracking is good! 1/10th of second @ISO400 is much better than 1/50th @ISO1000.