[rollei_list] Re: [rolleiusers] 4x5
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: "rollei_list@xxxxxxxxxxxxx" <rollei_list@xxxxxxxxxxxxx>
- Date: Sat, 3 Jan 2015 22:59:53 -0500
Glass types improved dramatically in the post war period and higher index
glass become more affordable for manufacturers... Many formulations were
recalculated and improved...
Eric Goldstein
--
On Saturday, January 3, 2015, Chris Burck <chris.burck@xxxxxxxxx> wrote:
> Actually, I believe the Dagor patent (1890s) was long expired by the time
> Schneider came out with the Angulon (circa 1930 IINM). They recalculated
> it sometime in the early post-WWII period, and there seems to be general
> agreement that the post war lens is the better performer (and not simply
> because of the benefit of coating). But the patent dates (I actually
> didn't realize they'd patented the Angulon; it was hardly a unique formula
> by that time) would seem to argue that Schneider felt using the "reverse"
> formula had some inherent benefit, since there was no need to circumvent an
> already expired patent.
>
> Anyway, interesting stuff.
>
> Richard, I'm very sorry to hear about your stolen gear. An Agfa-Ansco
> would be sorely missed, not to mention that Angulon. It may not be a very
> worthy shooter, but surely has some cache as a collectible.
>
> Keep a look out on that auction site, as well as Craigslist and local
> auctions. You never know. For that matter, if you haven't already done
> so, it would probably be a good idea to report the loss to communities such
> as this, the LFP forums, Photo.net, etc. I hope you can recover them.
>
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