T3D Re: conflict resolution

[jon siragusa <siragusa@xxxxxxxx>]

john bercovitz <bercov@xxxxxxxxxxx> wrote:
>
>I think I have contacted almost all of you individually now and 
>there seems to be a consensus as to how you would like to see 
>conflicts on the T3D list resolved.  Nearly everyone suggested 
>essentially the same approach.
>
>The disputing parties will be blindfolded and then led into a 
>dark room and the doors will be closed.  Stuck in the floor 
>will be a dagger.  The party who emerges from the room will
>be said to have always been correct in all of his posts.  
>Conversely, the other party will be said to have always been
>wrong and a complete fool.
>
>At this point I am looking for a dagger and a dark room.  Does
>anyone care to volunteer either?
>

Hey, I've got a dark room.  So long as no one hurts my enlarger!
Also: the, um, "extra" body can be conveniently disposed of in
New Yorks East River, just a stones (or bodies!) throw away.  We
might have to wait in line for the mob guys to finish though.

So... to turn this into something that even vaguely resembles an
on-topic post, my question:

Does anyone have any references (preferably online) that deal with
the physics of lenses, etc?  I have had one of those Revere lens/shutter
boards lying around for some time now and I want to build a camera 
from it.  I guess my first question is how far do the lenses need to 
be from the film plane?  But I would really like to know how I can 
calculate this for any lens.

Thanks for any info!

jon




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