What does ef bayonet mean?

EF bayonet refers to a specification of lens caliber of SLR cameras owned by Canon, which has been widely recognized in the industry because of its huge sales volume and high market share. EF bayonet has become the first choice for photographers because of its strong carrying capacity and wide focal length range. Many Canon SLR cameras are equipped with lenses with this bayonet specification, and the interchange between cameras and lenses is very convenient.

EF bayonet has a wider focal length range than other bayonet, covering from standard focal length to super telephoto focal length, which can meet different shooting requirements. At the same time, because the radial space of EF bayonet is larger than other bayonet, it can carry more light into the camera, so as to get better picture effect. When in use, the EF bayonet and the bayonet are tightly connected, which solves the problem of looseness between the lens and the camera, thus obtaining a more stable picture.

the design function of p>EF bayonet is relatively basic. with the change of market demand, some new functions can't be well supported, so it needs to be realized by some additional components. In addition, the lens of EF bayonet is relatively bulky, which is relatively inconvenient for people who need to carry the camera for a long time. In addition, since the EF bayonet can only be used with Canon's SLR camera lens, if you need to change other brands of cameras, you need to re-purchase the lens or use a special conversion module, and the configuration cost is high.