If you have ever gotten into a heated argument or discussion with another person, you know it is very hard to find any subjects or statements that everyone will agree with. We all just...
Did You Know?
Lens speed : largest lens opening (smallest f-number) at which a lens can be set. A fast lens transmits more light and has a larger opening than a slow lens. Determined by the maximum aperture of the lens in relation to its focal length. The speed of a lens is relative to it's focal length. A 400 mm lens with a maximum aperture of f/3.5 is considered extremely fast, while a 28mm f/3.5 lens is thought to be relatively slow.