http://www.astrophoto.com/ngc7331CCD.htm
It was taken with the 14.5" f/8 Classical Cassegrain from 2500 foot elevation in my backyard observatory near Foresthill, CA. ST-10E camera (the one you sold me, not an ME) with off-axis guiding through an STV. Average error this night was .3 at 3000mm focal length on the read out ... graph looked almost like a straight line! I took a total of 6 - 25 minute exposures with the clear filter (not the IR cut-off clear). Images were debloomed with CCDOPS, converted to floating point IEEE FITS in MaxIM, reduced in MaxIM and aligned, blended in Sigma, converted to 16 bit Tiff in MaxIm, opened in PS with curves and did a little cleaning up with PS. This is essentially a quick and dirty image to see what I got ... final version coming, hopefully in color...shot 180 minutes of blue data last night ... same awesome seeing.
It was taken with the 14.5" f/8 Classical Cassegrain from 2500 foot elevation in my backyard observatory near Foresthill, CA. ST-10E camera (the one you sold me, not an ME) with off-axis guiding through an STV. Average error this night was .3 at 3000mm focal length on the read out ... graph looked almost like a straight line! I took a total of 6 - 25 minute exposures with the clear filter (not the IR cut-off clear). Images were debloomed with CCDOPS, converted to floating point IEEE FITS in MaxIM, reduced in MaxIM and aligned, blended in Sigma, converted to 16 bit Tiff in MaxIm, opened in PS with curves and did a little cleaning up with PS. This is essentially a quick and dirty image to see what I got ... final version coming, hopefully in color...shot 180 minutes of blue data last night ... same awesome seeing.
NGC1300 허블