Re: [ATM] Re:(ATM) F/10 or F/8?

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

You would be going back to Leon Foucault's original
methods, if you did! (Nothing really wrong with that.)
You could read my translation of his original article
if you want to see his method. It's on Bob May's
website, but my website has a pointer to it.
Guy

--- Jonathan Lavoie <atm@lavoielactee.net> wrote:
> Why don't we make ellipses enstead of spheres for
> slow F/ratio ? It is as 
> easy to do by just moving the light source near the
> mirror then work the 
> same way as making a sphere. Correcting half way to
> the parabola would make 
> it well inside the diffraction limit.
> 
> Jonathan 


Guy  Brandenburg
Washington, DC
My home page:
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
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