in Unertl mount Parabolic Mirror Beam Splitter Precision Collimator 11856

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  For sale is a system that is a Precision Collimator.
  It is composed of a appx. 24 inch parabolic mirror in Unertl mount.
  Also included is a appx. 24 inch Beam Splitter Window Glass,
  that has a half-mirror surface on one side and another 
  side is transparent. 

  This system has a focal distance of 264 inches. 

  I bought these pieces from a company called Recon Optical, that
  had these two pieces for testing spy airplane cameras. They sold
  this equipment because they moved operation to California.

  Having no understanding of such optics, I thought that both are 
  "optical flats". I even listed them on ebay auction, "sold" for a lot 
  of money to unwitting buyers. However, a gentleman stopped by, 
  who worked there as an optics engineer, and he explained to me 
  what these things are. He said that you could build a precision 
  collimator with them. Of course, I had to undo those transactions,
  thanks to gentlemanly understanding of those patient winning 
  bidders. Now I am listing them again, together, with corrected 
  explanations.

  The Unertl mount with mirror was not used all that much and spent 
  a long time in their storage. There is some minor rust on 
  the adjusting screws on the back, however, they all turn smoothly.

  For shipping, a custom pallet with a crate will be built, with
  a MANDATORY crating charge of $300, plus whatever it costs to 
  actually ship this.