04-22-2016, 08:46 AM
Quote:Dunno if I am understanding things wrong, but a lens designed to work in air glass environment, will it work the same in glass nothing environment ?
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.
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