What are the classifications of SLR lenses?

Abstract: What are the classifications of SLR lenses? SLR lens can be divided into zoom lens, fixed focus lens, macro lens, shift axis, soft focus and so on, while zoom lens can be divided into wide angle, standard zoom, telephoto zoom and so on. Fixed focus lens can be divided into wide angle, standard, telephoto, telephoto and ultra telephoto. Different kinds of SLR lenses have different uses. SLR lenses are divided into zoom lenses, fixed-focus lenses, macro lenses, axis-shifting lenses and soft-focus lenses.

zoom 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 end to telephoto end. 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.

Main 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).

Low power photographic lens

Macro lens is a special lens for macro photography, which is mainly used to shoot very fine objects, such as flowers and insects. In order to focus on the object correctly at a very close distance, the macro lens is usually designed to be longer so that the optical center is as far away from the photosensitive element as possible. At the same time, in the design of lens group, we should also pay attention to the control of close-range deformation and color difference. The focal length of most macro lenses is larger than that of standard lenses, which is not completely suitable for general photography.

Tilt shift lens

The shift lens is standing on the ground when shooting the building. In order to take a complete picture, the camera should be tilted slightly upward. Because the lower part of the building is close to the upper part and far from the upper part, the convergence effect of "the lower part is big and the upper part is small" will be adopted. The lens itself is not deformed, and the reason for this phenomenon is the perspective relationship. Correction: The camera is shooting a building. At this time, the lens angle may be insufficient, and it is necessary to change a lens with a wider angle. For a 35mm camera, the equivalent method is to shoot directly at the target with a lens with the same focal length but a larger viewing angle, and move the film to the reserved position when cutting (actually, the lens translates in the opposite direction). This kind of lens is called "axis-shifting lens".

soft focus

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.

But the zoom lens can adjust the distance freely, but the distance can be adjusted freely with the different focal lengths of each lens.