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Zeiss Tele-Tessar 500mm f/8 - well travelled, US$0.5M estimate
#6
 Water?

 

We (human beings/opticians),  are used to using the general term "air to glass surfaces" as a way of saying;

 

           "light passing through a refractive medium into free space".  

 

 

 On Earth in our case, free space contains air........... On the moon there is no air....  but light passing through refractive mediums into a vacuum is still same......only that the light rays are not degraded by air's refractive properties.....

 

 

   (On Earth we call it focus breathing JoJu..........on the moon it's called focus (last) gasping)...   :o

  


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Zeiss Tele-Tessar 500mm f/8 - well travelled, US$0.5M estimate - by davidmanze - 04-22-2016, 05:24 AM

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