Stephen McAvoy wrote:

> On 11 Dec 2003 10:47:24 -0500, Warp <war### [at] tagpovrayorg> wrote:
> 
> 
>> I thought that was called a pinhole camera.
>>
>> Well, it could have several names.
> 
> 
> I'm no expert but I will give an opinion :-}
> Some camera obscura(s) were pinhole cameras others had a lens and a mirror. The
> later were often rooms on top of a high outlook. (There is one in Edinburgh
> which is open to the public)  It relies on the room to be quite dark, not pitch

> (about 25 euro cents) 
> 
> Regards
>         Stephen

And a really nice one in San Francisco right down at the water's 
edge (see http://www.giantcamera.com/pages/893224/index.htm )

One of the oldest is in Pompeii (no lens or mirrors of course) where 
a room with an exterior wall is entered from the inner covered 
coutyard.  After dark adaptation you can see the outside scene 
upside down and reversed ... and image chariots rolling past.

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