Re: [APML] Tech Pan lives! (and a newish image)

[Aplanatic@aol.com]

Rob,

> I have a technical question about tech pan. When hypered
> approximately what speed does it become?

>From the characteristic curves supplied by Kodak I've tried a couple of times 
to estimate the quantum efficiency of various films.  One must make some 
potentially ill-founded assumptions.  Anyway, based solely on the SNR at low 
exposure index, I'd say that TechPan has a QE of between 3.5% and 7%.

Dave Rowe

--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>