I have a LX200 12" so I seldom use the big DOB. It has very good optical performance and is equiped with Sky Vector DSC, JMI NGF focuser and custom Russell alum ext tube.A NIB TV Parracor coma corrector is also available. Prefer trade for TV 85, LX200 8" or Meade 7" Mak. This is a big scope weighing in around 170lb, 5.5'long so shipping would have to be by freight. Prefer local deal. I'm in the Dallas area.