What do those signs on the Canon lens mean? Seek an explanation

The standard lens name can be basically divided into four parts: lens category, focal length parameters, aperture parameters and special technology.

First of all, the lens category

1, EF: Quan Huafu lens, the most common Canon lens category, can be used for EOS series film SLR cameras, full-frame digital SLR cameras, APD-H (coefficient 1.3), APS-C (half-frame camera coefficient 1.6) digital SLR cameras.

2.EF-S: APS-C frame lens, which is specially designed for APS-C SLR cameras, commonly known as half frame or residual frame. The sensor area is 40% of that of Quan Huafu, and the price is cheap. It is also our common Canon lens.

3.TS-E: axis shift lens. My personal understanding is that the lens can be Bai Wan, then shift the angle of view and change the focus range, which can be used in architectural photography and other aspects.

4.MP-E: Macro lens, specially used to shoot the hair on the fly's leg.

Second, the focal length parameters: the width and distance of the photos taken by the camera. The greater the value, the farther you shoot, and the smaller the value, the wider you shoot.

1, XXmm: fixed focal length lens cannot be adjusted. If you want to change the composition, you should spend more time thinking before pressing the shutter, and you will often get some unique observation angles. Because the fixed-focus lens is only responsible for one focal segment, the image quality and clarity can be maximized.

2. Macro: Macro macro. A lens with a certain magnifying function is used to photograph insects, flowers, food, etc. Many high-resolution lenses have a certain macro function, such as a lens that can take clear photos of flies' legs.

Third, the maximum aperture: the numerical value indicating the brightness of the lens.

1, and the fixed-focus lens is represented by a single value. In the zoom lens, the brightness does not change with the change of focal length, and the lens with the minimum aperture value changing with focal length represents the maximum aperture at the wide-angle end and the telephoto end respectively.

2, I, II, III, IV, V, these Roman numerals often appear on the lens. They said that this is the first generation lens, and the basic optical structure remains unchanged. The overall performance will be improved and greatly optimized.

Fourth, special technology.

1 is an image stabilizer, which is equipped with a lens with an optical manual compensation element. It is a technology to detect the direction and intensity of hand shake at the moment of shooting and apply force in the opposite direction to neutralize the shake.

2.USM: ultrasonic motor, which means that the lens can focus automatically quickly and quietly. The ultrasonic vibration is converted into rotary power to drive the focusing system, but the tiny sound of the internal focus will still be recorded when recording video.

3.STM: Stepping motor can realize quieter and smoother autofocus, which is suitable for short film recording. Powered by electromagnetic pulse, it is a new focus motor designed by Canon for recording video, which greatly reduces the noise generated by focusing during recording.

4, floating: floating function, with the technology developed by macro shooting. When shooting at close range, the lens group will move independently, effectively compensating the phase difference and obtaining better image quality.

Extended data:

Canon digital cameras are divided into IXUS series, POWERSHOT series, EOS series and Prima series. IXUS series is a fashionable digital camera, EOS series is a digital SLR camera, and Prima series is a small low-end series.

There are many categories under POWERSHOT series, including A series household all-around models, SIS series professional telephoto models, G series quasi-professional models and PRO series high-end models.

camera

At the same time with EOS80D, a brand-new EF-S18-135 MMF/3.5-5.6 isusm lens was introduced, which is a standard zoom lens to further improve the shooting performance of short films.

It is the first lens in EF lens to use Canon's new NANOUSM micro ultrasonic motor. Not only can you achieve high-speed focusing performance when shooting still photos, but you can also get a quiet and smooth focusing process when shooting short videos.

In addition, PZ-E 1 is a detachable electric zoom adapter, which can cooperate with ef-s18-135 MMF/3.5-5.6 isum lens to realize the electric zoom process when digital SLR camera EOS80D shoots video clips.

PowerShotA series representative: PowerShotA700 has six times optical zoom, which is another breakthrough after Canon achieved four times optical zoom on A series. In this way, the A700 will soon catch up with Ricoh R3' s seven-fold optical zoom. Become the leader of ordinary families in DC.

Using 1/2.5 inch CCD with 6 effective pixels, the optical zoom is 6 times. The focal length is equivalent to 39-2 10mm of a 35mm camera, and the maximum aperture is F2.8-4.8, 1 cm super macro.

The ISO sensitivity is: auto /80/ 100/200/400/800, and the shutter speed is 15- 1/2000s. The A700 inherits the consistent characteristics and technical performance of A series, and is equipped with powerful Canon DIGICII image processor and iSAPS technology, achieving higher response speed and better image quality.

Support aperture priority, shutter priority and full manual exposure operation, 19 scene shooting mode, 9-point autofocus system, support self-timer delay of 2 seconds or 10 second, and can shoot sound dynamic short films in VGA format.

The A700 uses SD/MMC card for extended storage, and the fuselage has built-in 16M storage space. In terms of power supply, it supplies power to two AA batteries. The overall dimensions of the fuselage are 94.5×66.5×43.4 mm, and the weight of the fuselage is 200 grams. ..

Canon official website-Basic knowledge-EF lens