John,
I believe this is a form of IC coating.
Brian P. Huber
bphuber@xxxxxxxxxx
Troy, OH
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx [mailto:owner-olympus@xxxxxxxxxxxxxxx]
On Behalf Of John A. Lind
Sent: Tuesday, June 08, 1999 8:51 AM
To: olympus@xxxxxxxxxxxxxxx
Subject: Re: [OM] Extension tubes?
Importance: High
I noted that my tubes have virtually 100 0ght transmission (no spiders)
and it was impossible to get any of them to exhibit flare . . . or
distortion. Measured them without any lens on front as I didn't want lens
performance to skew tube performance. Allegedly the glass in them is a
very secret formulation developed by the same guy who once sold clothing to
Kings.
-- John
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