Wikipedia defines camera obscura as-"is an optical device that projects an image of its surroundings on a screen"
Imagine my surprise when, recently in San Francisco, I found a working camera obscura!
Leonardo da Vinci describes the camera in his notebooks-"In 1490 Leonardo da Vinci gave two clear descriptions of the camera obscura in his notebooks. Many of the first camera obscuras were large rooms like that illustrated by the Dutch scientist Reinerus Gemma-Frisius in 1544 for use in observing a solar eclipse."
The camera was built as a tourist attraction by Floyd Jennings, a San Francisco businessman , on a cliff overlooking Seal Rocks . Life Magazine featured it in their March 1964 issue.
Cliff House on Ocean Beach and is a little worn for wear now. There are no longer lines of people waiting to enter in this age of digital photography and cellphone cameras, but geeky art-minded people like me still wander in and are amazed with the simplicity and clarity of the images.
The fact that these images are in "real time" with motion of the waves and birds flying, made this a popular tourist attraction in the 1960's.
Being the geek I am , I just purchased a camera lucida, based on the early principle of the camera obscura. This will be used for transferring images for decorative painting. If your curiosity is peaked, but don't want to spend major bucks....
Yes! There is an app for that!