What is the big ternary number?

Big ternary lens refers to the floorboard of three zoom lenses with constant aperture of F2.8. These three lenses are only responsible for super wide angle, standard zoom and telephoto. Together, they can cover the most commonly used focal length from super wide angle to telephoto (usually 16-200mm), so they are called "big ternary". At the same time, only the top-grade constant aperture lens can be named "Big Ternary". "Big Ternary" lens is not unique to a certain brand of lens, and each lens group has its own big Ternary.

Extended data:

Canon has a "big ternary" and Nikon also has a "big ternary", which will be updated with the introduction of new lenses. Super wide angle: Canon EF 16-35mm/2.8LIIUSM standard: Canon EF24-70mMF/2.8LIIUSM telephoto: Canon EF70-200 MMF/2.8 liiusm This new zoom lens has a series of professional features and can provide outstanding overall performance. This lens not only has a stable maximum aperture f/2.8 at all focal lengths, but also has a shorter main focal length of 0.28 m/0.9 ft at the focal length of18-24 mm. This lens is especially suitable for news photography and general photography.