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Honestly I would save more money and buy a 'know' brand name scope like GSO, Meade or Skywatcher and if you can from a reputable dealer that has a good warantee and after sales service. Second hand ones should be thouroughly checked out. The Seben Dob. comes with a spherical mirror which gives inferior images. The better quality ones have parabolic mirrors which give improved images. Avoid Seben scopes as they have inferior optics and build. It you 'Google' Seben scopes you will see they have a poor reputation.
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