From: "Bil Bug" <thatpuppetguy-AT-q.com>
To: <puptcrit-AT-puptcrit.org>
Date: Tue, 16 Feb 2010 10:26:25 -0600
Subject: Re: [Puptcrit] Technical Eptitude


There was a demonstration of an 18th century camera obscura at Grand Portage 
National Monument a few years ago. The demonstration included exactly the 
use of the camera obscura to capture an image and do the tracing and 
painting from that image. Way cool! Plus, the pin-hole was demonstrated 
later within a dark tent with only a small "pin point" of light entering and 
"painting" the entire interior of the tent with a panorama of the exterior, 
the 18th cent. fur post at GP.

Wayne

--------------------------------------------------
From: "Alan Cook" <alangregorycook-AT-msn.com>
Sent: Monday, February 15, 2010 11:35 PM
To: <puptcrit-AT-puptcrit.org>
Subject: [Puptcrit] Technical Eptitude

> Rolande, you mention a new technique for projecting without film. That got 
> me to thinking about some old techniques such as the CAMERA OBSCURA, which 
> can be as simple as a pinhole lens, or fancier with a glass lens. 
> Basically it is a camera without film to record an image---you see the 
> image as it occurs...In a house my family owned when I was in junior 
> high/high school & college years, we had a narrow back porch which had a 
> toilet room to one side. The keyhole in the door acted as a lens, 
> capturing the image of the house next door, which appeared upside down on 
> the wall, in perfect focus. It is thought that some Italian landscape 
> painters may have used a small camera obscura to perfect the perspective 
> in paintings of Venice cityscapes. With the right set-up, one could trace 
> the image onto paper or canvas, and thus end up with a very accurate 
> depiction of buildings, bridges and plazas in perfect perspective.. The 
> original word, "camera", referred to a room in a house.  I imagine that 
> someone notced a visual phenomenon
> similar to the one we saw on our back porch, thanks to another keyhole.
>
> It takes a creative person to see possibilities and applications of such 
> discoveries.
 

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