A cylindrical optical lens is typically used to focus, condense or expand incoming light. A cylindrical optical lens has one cylindrical surface, causing light to be focussed in a single dimension or ...

A plano-convex cylindrical lens is used to condense light in one axis. A positive cylindrical lens is able to create a line image from a point of light, to change the aspect ratio of an image or to ...

The world of cameras is vast, and for beginners, a cursory glance alone can present tons of questions. Which of the major camera brands are the worst and best? What kind of photography or videography ...