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Forums > Back > Zeiss Tele-Tessar 500mm f/8 - well travelled, US$0.5M estimate
toni-a
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#8
04-22-2016, 08:52 AM
Quote:Look at the refractive index:

Vacuum: 1.0000

Air: 1.0003

Water: 1.33

Glass: 1.52 (Schott BK7)

 

So is the difference between air and a vacuum significant? For photographic purposes I'd say no.
now that makes sense

Many thanks popo for clarifying
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Zeiss Tele-Tessar 500mm f/8 - well travelled, US$0.5M estimate - by toni-a - 04-22-2016, 08:52 AM

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