exam TURNER CANA VERMEER

The term 'camera obscura' translates into 'dark chamber',
as its most basic form was a dark room, windows
shuttered, with a small hole on one wall. This method uses
the sun to portray outlines onto a canvas to give accurate
perspectives of what your trying to reveal. Once the light
enters the room through the hole, the image outside is
transposed invertedly onto the opposite wall. The light
travels in a straight line also known as rectilinear
propagation of light. The size of the hole influences the
image as a small hole creates a sharp but dim image and a
larger hole produces a brighter picture but less focused,
with the sun only being clearly visible.
It is suggested that Johannes Vermeer was
the pioneer of a method called camera
obscura. It is not certain that Vermeer used
camera obscura but the evidence and
layout of his composition has led many to
believe that he used this technique in his
later works as an aid for his painting. The
camera obscura was the prototype of the
photographic camera, but without the lightsensitive
film or plate.
Camera obscura changed around the mid-
16th century after a man called Cardano
replaced the pinhole with a lens, which was
described in his book “De Substilitate Libri.
This increased the brightness and image size.
You could focus the image by moving the lens
or the viewing surface.