Camera Obscura - how we really see things

Submitted by Jeff Buster on Wed, 05/08/2013 - 00:01.

 

How does a hole in the wall act as a lens?   

How does the diameter of the hole in the wall act with regard to focal distance?

The image above has about a 4 foot focal distance.

Camera Obscura - lots to learn!

Image: George Samuel - about 3.5 minute exposure.

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