[rollei_list] Re: Lens coatings and veiling flare.

On 7/7/2009 6:20 PM, Eric Goldstein wrote:
But it would be interesting to hear from Richard or other
knowledgeable parties as to whether new single coating technology is
superior to the single coating methods of the 50s... you'd think it
would be and there would be some improvement after 50+ years...


Eric

Of course it is. Call John Van Stelten for a technical discussion. The original lens coatings were both chemically poor and optically less than ideal: even early "hard" vacuum coatings were relatively soft and, in many cases, the coatings have gone from the front and rear elements, leaving only the internal elements coated. And the precise ability to coat for a given wave-length took fifteen or twenty years to develop.

Modern coatings are far more durable and the wavelength control is far better than it was a half-century back.

Marc


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