Sergei Golyshev (AFK during workdays)
Splitting doubles #3: epsilon Bootes, Izar
In the pitch whiteness of summer twilight I finally set my telescope after εBoo, Izar.
Top right - widefield image of constellation Bootes, the red circle roughly encompasses the region of interest.
Center - richfield (as rich as conditions allow :( ) image centered on Izar.
Bottom left - splitting attempt with 3750 mm focal length. Although the doubleness is visible, I had scrambled colors of the components and I'm rather dissatisfied with the shape of diffraction pattern, which badly resembles that of pinched mirror.
Nonetheless I had split the pair with 2,8 arcseconds of separation and had brought the optics into much more collimated state then it was before.
Acquisition time (start movie recording): JD2456809.379606 (01.06.2014, around 01:06:38 MSK)
Equipment:
Widefield: Anywhere Is :)
Rich- and narrowfields:
Canon EOS 60D (unmodded) running Magic Lantern firmware override fitted with Baader Planetarium MPCC MkIII coma corrector (for richfield) or Bresser 5x SA Barlow lens (for narrowfield) on Celestron OMNI XLT 150 mm Newtonian riding Skywatcher NEQ-6 Pro mount with counterweight shaft extention.
Aperture 150 mm
Focal length 750 mm (RF) or 3750 mm (NF)
Tv = 60 and 30 seconds (for RF) and 1/50 seconds (for NF, movie mode)
Av = f/5 and f/25
ISO 1600 (RF) or 3200 (NF)
Exposures: richfield: 14+7 (plus 11+12 dark frames plus respective master offset and master flatfield images from the library); narrowfield: 5% of 15000.
Processing:
Richfield
Images were converted into .DNG and fed to DSS. "Superpixel" color generation mode was used, so the final image is two times smaller than the original subs.
Narrowfield:
Quicktime movie was converted into .AVI and process with Autostakkert!2 (I didn't told it that it was a star :)
Final assembly and adjustment were done in Photoshop.
Splitting doubles #3: epsilon Bootes, Izar
In the pitch whiteness of summer twilight I finally set my telescope after εBoo, Izar.
Top right - widefield image of constellation Bootes, the red circle roughly encompasses the region of interest.
Center - richfield (as rich as conditions allow :( ) image centered on Izar.
Bottom left - splitting attempt with 3750 mm focal length. Although the doubleness is visible, I had scrambled colors of the components and I'm rather dissatisfied with the shape of diffraction pattern, which badly resembles that of pinched mirror.
Nonetheless I had split the pair with 2,8 arcseconds of separation and had brought the optics into much more collimated state then it was before.
Acquisition time (start movie recording): JD2456809.379606 (01.06.2014, around 01:06:38 MSK)
Equipment:
Widefield: Anywhere Is :)
Rich- and narrowfields:
Canon EOS 60D (unmodded) running Magic Lantern firmware override fitted with Baader Planetarium MPCC MkIII coma corrector (for richfield) or Bresser 5x SA Barlow lens (for narrowfield) on Celestron OMNI XLT 150 mm Newtonian riding Skywatcher NEQ-6 Pro mount with counterweight shaft extention.
Aperture 150 mm
Focal length 750 mm (RF) or 3750 mm (NF)
Tv = 60 and 30 seconds (for RF) and 1/50 seconds (for NF, movie mode)
Av = f/5 and f/25
ISO 1600 (RF) or 3200 (NF)
Exposures: richfield: 14+7 (plus 11+12 dark frames plus respective master offset and master flatfield images from the library); narrowfield: 5% of 15000.
Processing:
Richfield
Images were converted into .DNG and fed to DSS. "Superpixel" color generation mode was used, so the final image is two times smaller than the original subs.
Narrowfield:
Quicktime movie was converted into .AVI and process with Autostakkert!2 (I didn't told it that it was a star :)
Final assembly and adjustment were done in Photoshop.