[Konvas] Lepton accelerators (off topic - like you need to guess!)

[Peter Haas]

On Nov 14, 2008, at 2:09 PM, H. W. Stone wrote:

> Back to "where things are made.." - the famous Leitz 50mm Summicron  
> is actually made in a wonderfully unlabelled building in the  
> Kingdom of Ontario, Canada.  Home to Toronto, the actual center of  
> the Universe....just ask Torontonians:  they'll confirm it...
>
>
> While not all Summicron lenses were Canadian, a lot of them were.   
> When Leitz/Minolta/Hughes were setting up Elcan the guys at Leitz  
> ran a batch of one hundred 50mm f2 Summicron rigid lenses (not the  
> older collapsable version) and wanted to test them against  
> Deutschland Summicron production, so engineers, being engineers  
> instead of politico or sales, took one hundred of the Wetzlar  
> lenses from the same time span, then put black "unmarked except for  
> test number rings" over the ID ring on the front and silver tape  
> blocks over the mfg marks on the side, then carefully ran the full  
> set of tests, finding factors like true focal length (little known  
> fact-- a "nominal 50mm" lens may vary from 48mm to 53mm during  
> production runs from sample to sample), color handling, resolution  
> on black and white 200:1 targets, 500:1 targets, and 1000:1  
> targets, tricolor stripes, flare, shadowing, squareness of image,  
> and a bunch of other factors.

Leitz Canada (AKA, Huge Air Crash) made glass for some of  
Panavision's early anamorphics.

A Japanese manufacturer, of no particular note, made glass for some  
of Panavision's early sphericals.

Panavision has been known to remount competitive glass, incredibly  
even Bausch & Lomb CinemaScopes, and by doing so turning those into  
their own.