What is the difference between Canon rf lens and ef lens?

For newcomers who have just come into contact with photography and Canon, the first thing they need to understand is the difference in functions of various Canon lenses, because taking a good photo depends not only on the main performance of the camera , is also closely related to the camera lens. So what is the difference between Canon RF lenses and EF lenses? The editor will introduce it to you in detail in the following content.

1. The difference between Canon rf lens and ef lens

1. ef lens

The English name of ef is Electronic Focus, and the Chinese explanation is electronic focus. The mount name of Canon EOS series cameras is also the series name of EOS original lenses.

EF lens names are composed of a variety of numbers and letters. All values ????and symbols have their own meanings. The EF-S lens is exclusively for APS-C format models, and the EF-M lens is exclusively for the EOS-M series. EF, TS-E, and MP-E lenses can be used with full-frame and APS-C frame cameras. When you want to mount a lens other than EF-M to the EOSM series, you need to use the mount adapter EF-EOSM.

2. RF lens

RF lens refers to the lens suitable for RF mount, Canon EOSR series dedicated RF mount lens. The RF lens takes advantage of the 54mm large mount diameter that is consistent with the RF mount and the short back focus distance 1 of the RF mount to achieve overall high image quality and miniaturization of the optical system. The flexibility of RF lens design is significantly improved compared to EF lens design.

3. The difference between RF and EF lenses

Canon EF lens is a SLR system, with a longer flange distance, 44mm, and 8 electronic contacts; while Canon RF lens is a specialized micro system , shorter flange distance, 20mm, 12 electronic contacts, which can transmit more information. Canon RF lenses can be loaded with a multi-function ring that can define a certain function.

2. Differences in functions of various Canon lenses

Canon has many lenses, and the functions of different models of lenses are different.

Canon can be divided into the following types of lenses in terms of interfaces:

1. Lenses starting with EF are dedicated lenses for Canon half-frame and full-frame bodies;

2. Lenses starting with EF-S are Canon’s special half-frame lenses and cannot be installed on other bodies;

3. Lenses starting with EF-M are Canon mirrorless lenses. Special lenses for cameras;

4. Lenses starting with EF-RF are the latest lenses developed by Canon specifically for full-frame mirrorless cameras.

But the function of the lens mainly depends on the focal length of the lens:

1. Lenses with focal lengths below 28mm are more suitable for shooting landscapes;

2. 50mm- The 28mm focal length lens is more suitable for shooting humanistic themes or environmental portraits;

3. The 50mm-135mm focal length lens is more suitable for shooting portraits or still life shooting;

4. Lenses with focal lengths above 135mm are more suitable for sports photography, ecological photography, large-scale parties, etc., and can also be used for portrait photography.

3. Decorative lines on Canon lenses

1. Red circle: There is a letter L on the lens, which is the initial letter of Luxury (luxury, luxury). Lenses with L , referring to Canon’s high-end lenses. The workmanship, imaging, materials, etc. of high-end lenses are better than other lenses, and of course the price is higher.

2. Green ring: Canon has only produced a few special green ring lenses, the more famous of which are 70-300mm small green, 400mm, etc., which are Canon's mid-to-high-end products. The quality of the lens with the green ring is also good, and the colors are richer.

3. Gold ring: Canon lenses with gold rings refer to lenses with USM ultrasonic motors, which belong to Canon's mid-range product series.

4. Silver ring and white ring: Lenses with silver ring or white ring are Canon’s special lenses for half-frame, usually lenses with IS optical anti-shake, the price is ordinary, but the image quality is good Not bad either.

5. No ring: If the Canon lens does not have a ring, generally speaking, this type of lens product is a symbol of low price and workmanship, but it may also be due to design issues.

The above is about the differences between Canon RF lenses and EF lenses, and the differences in the functions of various Canon lenses. I hope it will be helpful to everyone!