The Standage reading gave details about how to construct a camera obscura. The reading included detailed instructions as well as blueprints (figures) showing how they can be made.
Mills’ article talks about the camera obscura and the painter Vermeer. Apparently, it is debated that his paintings were done from camera obscura projections. Mills demonstrates how and why this can’t be the case.
The Mills article also talks about the differences between types of lenses and defines important terms, such as focal length.