Canon EF lenses are not the same as EF S lenses

The APS-C half-frame camera can be used with any Canon lens, and the full-frame can only be used with EF heads.

EF lenses support full-frame, APS-C format is also available, but the actual focal length changes, EF-S lenses only support APS-C format, full-frame cannot be used, otherwise vignetting will occur. Hope it works for you.

First, the reference is different.

1. Canon EF: It is a comprehensive concept of focusing electronics. The camera and the microchip inside the lens exchange information through electronic signals and drive the motor inside the lens to focus.

2. Canon EF-S: APS-C format digital SLR camera electronic mount.

Second, the positioning is different.

1. Canon EF: It adopts the method of "camera distance measurement and built-in motor drive of the lens" without a mechanical communication system between the camera and the lens, which fully foresees the development trend of the digital age. The electronic control of the camera was further developed and played a large role in the communication with various accessories.

2. Canon EF-S: An electronic lens specially designed for its APS-C format DSLR camera, which can only be applied to the Canon DSLR in APS-C format, and its distinctive feature is that there is a white square at the interface for aligning the body clamp position.

Third, the characteristics are different.

1. Canon EF: The control elements use dedicated multiprocessors in the camera, lens, and accessories to work closely with each other to keep the system running. Various data exchanges are carried out between the camera and the lens, and there are more than 50 kinds of instantaneous information related to the lens alone.

2. Canon EF-S: There is a protruding rubber ring on the back, so it cannot be used for full-frame bodies, EF-S is produced to match the CMOS area of the actual size, with the aim of reducing costs as much as possible to match the sales strategy of 300D.

What is the difference between Canon EF-M lenses and EF-S lenses and RF lenses, and are they all the same mounts?

The bayonet of the pro-three is not the same. The differences between the three lenses are as follows: 1. The optical structure is different

EF-M and EF-S correspond to SLR cameras, with a flange distance of 44mm and 8 electronic contacts. The RF corresponds to a mirrorless camera with a flange distance of 20mm and 12 electronic contacts. 2. The bayonet is different:

The EF-M is a mount for Canon's half-frame mirrorless lenses. The EF-S is a mount for Canon's half-frame SLR lenses, and this mount is actually the same as the EF mount, but Canon has done some processing to prevent it from being mounted on a full-frame SLR body. The RF is a mount for Canon's full-frame mirrorless lenses.

3. Different positioning: EF-M adopts the method of "camera ranging, lens built-in motor drive" without a mechanical communication system between the camera and the lens. The EF-S's electronic lenses, designed specifically for its APS-C format DSLRs, can only be used on the Canon DSLR in the APS-C format, and features a white square at the connector for aligning the body slots.

RF full-frame constant F2 aperture standard zoom lens. It covers the most used focal lengths in everyday life and delivers extremely high image quality while maintaining a wide aperture throughout.

Canon RF lenses and EF lenses are obviously not versatile. The Canon RF mount and Canon EF mount correspond to full-frame camera specifications. Since the flange distance of the Canon EF mount is longer than that of the Canon RF mount, the Canon EF lens can be transferred to a special microbody equipped with a Canon RF mount by means of an adapter ring (the Canon tube is called a mount adapter).

However, since a short flange distance lens cannot be used on a long flange distance body, Canon RF lenses cannot be used on a single-lens reflex body with a sensitive medium size and Canon EF mount.

No. The EF-S mount, which Canon has improved specifically for the APS-C format, is an abbreviation for "Short Back Focus", which means short back focal length, and lenses with EF-S mount have a shorter back focal length, that is, the back group of the lens is closer to the imaging plane.

The lens of EF-S is mounted on the body of the EF mount, and the rear of the mirror wheel head will interfere with the reflector of the fuselage, which is commonly known as "playing the plate".

All three are different.

The EF-M is a mount for Canon's half-frame mirrorless lenses.

The EF-S is a mount for Canon's half-frame SLR lenses, and this mount is actually the same as the EF mount, but Canon has done some processing to prevent it from being mounted on a full-frame SLR body.

The RF is a mount for Canon's full-frame mirrorless lenses, and of course half-frame mirrorless lenses can also be used, but it has not yet been released.

The difference between these types of lenses is still very ......The optical structure is completely different, and the bayonet is not the same......

For example, EF and EF-S correspond to a single-lens reflex camera, with a flange distance of 44mm, and 8 electronic contacts, for example, RF corresponds to a mirrorless camera, with a flange distance of 20mm, and 12 electronic contactsWhat is the specification of EF-M, I can't remember the ......

In addition, their communication protocols also have different ......

Canon is: Electronic Focus, which is the name of the mount for Canon's EOS cameras, and is also the name of the series of EOS original lenses.

For example, EF24-105mm means that the lens is a zoom lens, and the zoom range is between 24mm and 105mm. A smaller number means a wider viewing angle, and a larger number means a larger view of the distant scene.