Pentax do make high refractive index lenses for spectacles, which indicates they do
make their own glass. Don't see why they wouldn't do the same for their photographic
lenses too.
Nick
-----Original Message-----
From: "Rob Studdert"<[EMAIL PROTECTED]>
Sent: 21/02/04 01:18:37
To: "[EMAIL PROTECTED]"<[EMAIL PROTECTED]>
Subject: Re: glass
On 20 Feb 2004 at 14:51, [EMAIL PROTECTED] wrote:
> Does not Pentax make their own glass?
I don't believe so, most glass for lenses is sourced from Schott or Hoya. Even
Leica who did produce small batches of very specialized glasses for production
now have it produced to spec (formulations protected) but even this is oft
disputed:
http://mejac.palo-alto.ca.us/leica-users/v04/msg10626.html
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT) +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications/
Pentax user since 1986, PDMLer since 1998
