The logo on the lens often indicates the function of this lens.
A, focal length, aperture identification, in the focal length of the lens, aperture identification of the various families are the same.
① focal length: the focal length of the fixed focal length lens with a single value, such as: 50mm, 85mm, etc.; zoom lens focal length with two values to indicate the focal length of the two ends, such as: 16-35mm, 24-70mm, etc..
② aperture identification, fixed focal length lens aperture value is a single focal length value for a single aperture value, such as: 50mm f/1.8, 35mm f/1.4, etc.; constant aperture lens aperture value is a single value, such as: 24-105mm f/4, 16-35mm f/4, etc.; aperture value of a zoom lens is a value of the two values, one indicates the maximum value of wide-angle end The aperture value of a zoom lens is two values, one indicating the maximum value at the wide-angle end, and one indicating the maximum aperture at the telephoto end, e.g.: 100-400mm f/4.5-5.6, 70-300mm f/4-5.6, etc.
Two, Canon lenses on the logo
①Lens type:
EF lens: this type of lens is mainly applicable to Canon's EOS system DSLR cameras;
EF-S lens: this type of lens is mainly applicable to Canon's APS-C format DSLR cameras;
TS-E lens: This is a shift lens;
EF-M Lens: EOS-M series specific lens;
RF Lens: Lens for RF mount, Canon EOSR series lens.
②Lens characteristics
L: L: L-class lens is also commonly referred to as the red ring lens;
USM: indicates that the lens is equipped with an ultrasonic motor;
STM: indicates that the lens is equipped with a stepping motor;
IS: indicates that the lens is stabilized, or what is known as the anti-shake lens;
DO: indicates that the lens DO lens is used;
II/III: indicates that the lens is the first generation of the product.
III, Nikon. Compared to Canon, Nikon's markings on its lenses are much more detailed.
①Autofocus type, just shared that Canon uses EF, EF-S, etc. to denote different lens types, while Nikon here uses AF, AF-S to denote the autofocus type of the lens.
AF: indicates that the lens supports body-driven autofocus;
AF-I: indicates that the lens is equipped with a focus motor;
AF-S: indicates that the lens is equipped with a SWM focus motor.
②Lens aperture control mode, Nikon in terms of lens aperture control mode, generally differentiated by D, G, E.
The lens aperture control mode, Nikon in terms of lens aperture control mode, generally differentiated by D, G, E.
D: indicates that the lens has an aperture ring design;
G: indicates that the lens is controlled by the body to adjust the aperture;
E: indicates that the lens has a built-in electromagnetic aperture. ③ Other
DX: indicates that it is suitable for Nikon APS-C format cameras;
FX: indicates that it is suitable for Nikon full-frame phases;
VR: indicates that the lens is stabilized.