The role of the lens

Telefocal lenses and telephoto lenses are divided into telephoto zoom lenses and telephoto fixed-focus lenses. It is manifested in the following categories.

Standard lens can be divided into: standard zoom lens and standard fixed focus lens.

Zoom lenses can be divided into wide angle, standard zoom and telephoto zoom.

Wide-angle zoom: When taking extremely wide photos, the first choice is a wide-angle zoom lens. Even a small change in focal length will bring extraordinary results.

Standard zoom: Common lenses can take ideal photos from wide angle to telephoto. Suitable for beginners, both portrait and scenery can be taken into account.

Long-distance zoom: it can instantly enlarge the distant scenery and fully feel the unique bold framing and extreme background blur of the long-distance zoom lens.

Fixed focus lens can be divided into wide angle, standard, telephoto, telephoto and ultra telephoto.

Wide-angle fixed focus: it can shoot scenes beyond the normal viewing angle, and the fisheye lens can shoot a wider viewing angle of 180 degrees.

Standard fixed focus: The charm of standard fixed focus lens lies in its real and excellent imaging ability, which is suitable for shooting various scenes from portraits to landscapes.

Long-distance focusing: it can bring the subject closer, create excellent background blur effect, and even use faster shutter speed to solidify the action.

Telefocus: Not only can the distant subject be magnified at high magnification, but also the background can be greatly blurred, thus taking photos that highlight the subject.

Super telephoto fixed focus: Whether shooting wild animals and plants or sports scenes, the descriptive power full of telepresence is unmatched by other lenses.

Portrait: Suitable for fixed-focus camera shooting with 50mm (commonly known as Yuntai), 85mm and135 mm. ..

Scenery: Suitable for wide-angle fixed focus (such as 14mm, 20mm and 24mm) and wide-angle zoom (such as 15~85mm and 17~55mm).

Soft focus lens: suitable for portrait shooting. The photo taken with this lens is very different from the effect of camera moving or focusing incorrectly. It uses carefully designed spherical aberration to make the shot scene clear and focused, soft and beautiful. The effect of soft focusing depends on the aperture size and special adjustment device. Due to the spherical aberration of the lens, the color performance will decrease when the soft focus effect is used. A real soft-focus lens will have a diffusion effect when shooting in backlight. In addition, when shooting under the backlight, the spread of light spots is very beautiful, especially at night. Backlight can shoot very dreamy visual effects. ?

Let's talk, like what? 18- 135? What do these values before and after the focal length mean: Canon EF-S, for example? 18- 135mm？ f/3.5-5.6？ be

Canon: This is the brand name, needless to say.

EF-S: A lens specially designed for APS-C format. (If so? EF? It is specially designed for Canon full-frame cameras, but it can also be used for APS-C cameras. )

18- 135mm？ The zoom range of this lens is from the wide-angle end of 18mm to the telephoto end of 135mm. .

f？ : the code name of the aperture.

3.5-5.6? : wide-angle aperture 3.5? -telephoto end aperture 5.6? .

Is it? : Anti-shake function code

Explain that this is a Canon camera specially used for APS-C format, with wide-angle focal length 18mm and telephoto focal length 135mm? Zoom lens with 7.5 times zoom ratio and large zoom ratio with anti-shake function.

Some lens codes, and finally? USM？ : Represents a lens with an ultrasonic motor.

According to the design requirements, all lenses should have the function of correct imaging.

The main function of the fuselage is to convert the optical imaging information of the lens into corresponding electronic information and store it.

Therefore, the image sensor is the most important part of the fuselage.

The fuselage is mainly composed of: power supply, photometric imaging, framing and focusing? Sensitivity, exposure control, color temperature control? , shooting, flash and frame system.

This photo was taken with a soft-focus lens.

I hope it helps you.