What is the "big ternary" in Canon lens? "Small three yuan"?

Big ternary is three zoom lenses with a constant aperture of 2.8.

These three are 16-35 2.8 wide-angle angles.

24-70 2.8 medium focus zoom is also commonly known as the golden focal length.

70-200 2.8 telephoto zoom This lens is commonly known as Xiaobai, and there is another style with anti-shake, that is, 70-200 is 2.8 called making love to death Xiaobai.

Small ternary is three zoom lenses with a constant aperture of 4.

These three are 17-40 4 wide-angle zoom.

24- 105 4 Omni-directional zoom, also known as on-hook lens or tourist lens, is because it has a comprehensive focal length and does not need to change lenses during travel.

70-200 4 telephoto zoom This lens is commonly known as Guo Xuwei, and there is also a style with anti-shake, that is, 70-200 IS 4 is called Love to Guo Xuwei.