What is the difference between RF and EF lenses?

The difference between rf and ef lenses: 1. The main bodies of rf and ef lenses are different; 2. rf has a large aperture with an inner diameter of 54mm and a short back focus distance. ef is a microchip in the camera and lens through electronics. signals for information exchange; 3. RF adopts a new bayonet, which improves the freedom of optical design and the possibility of system development. EF adopts "camera ranging lens built-in motor drive"; 4. The diameter of RF buckle is larger than that of EF buckle Large; 5. RF is faster and more accurate focusing than EF; 6. RF can only be used on RF cameras, EF can be converted using an adapter.

# Operating system for this tutorial: EF-S18 system, Canon camera.

1. The difference between rf and ef lenses

1. The subjects are different. The EF lens is a comprehensive development of the concept of focusing electronics; the RF lens is the core of system development, and the EOSR system is expected to become an evolving imaging system.

2. Different characteristics. The EF lens allows the camera and the microchip in the lens to communicate information through electronic signals, driving the motor in the lens to focus; the RF lens has a large inner diameter of 54mm and a short back focus distance, which greatly improves the flexibility of optical design and enables It can develop ideal lenses.

3. Different advantages. The ef lens adopts the "camera rangefinder lens built-in motor drive" method. There is no mechanical communication system between the camera and the lens. The RF lens aims to further expand the field of photography and provide users with more ideal lenses. It adopts a new standard bayonet to improve Offering freedom in optical design and system development possibilities, the EF mount is the traditional mount for Canon camera lenses, while the RF mount is a brand-new mount for Canon's full-frame mirrorless cameras.

4. Different sizes: The diameter of the RF mount is larger than that of the EF mount, which provides space for faster autofocus and higher light passing ability.

5. Focus Different technologies: Due to the design of the RF mount, Canon can use more advanced focusing technology. For example, the RF mount allows the use of Canon's DualPixelCMOSAFII technology, which provides faster and more accurate focusing in a wide range of situations.

6. Different compatibility: Due to the difference between EF and RF mounts, EF lenses cannot be directly installed on RF cameras, but Canon's adapter can be used for transfer. However, RF lenses can only be installed on RF cameras. used on.

2. Differences in functions of various Canon lenses

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

Canon can be divided into the following types of lenses based on the interface:

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

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

3. Lenses starting with EF-M are special lenses for Canon mirrorless 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 a focal length below 28mm are more suitable for shooting landscapes;

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

3. A lens with a focal length of 50mm-135mm is more suitable for shooting portraits or some still lifes;

4. Above 135mm Lenses with this focal length 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 first letter of Luxury (luxury, luxury), with Lenses with an L refer 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 & white ring: Lenses with silver ring or white ring are Canon’s special half-frame lenses. They are usually lenses with IS optical image stabilization and are generally priced. But the picture quality is pretty good.

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 the detailed content of What is the difference between RF and EF lenses?. For more information, please follow other related articles on the PHP Chinese website!