The lens is mainly divided into zoom and fixed focus, as well as magnification.
Zoom lens is variable focal length, that is, you can push and pull the lens. In addition there is a fixed focus lens, that is, the focal length can not be changed only one focal length, or only one perspective.
In the appearance of the lens there are significant differences between the two, fixed focus lens only focus ring (that is, control clarity, later introduced), and zoom lens has two rings, a focus ring (control clarity) and zoom ring (control Perspective, ie push and pull).
Fixed focus lens
Fixed focus lens because of its focal length fixed, so better classification:
Wide-angle lens: generally less than 35mm lens for the wide-angle lens, less than 28mm for the ultra-wide angle lens. Wide angle lens wide, deep sense of strong, the scene will be deformed, more suitable for shooting larger scenes of photos, such as architecture, rallies and so on.
Medium focus lens: generally in the 36mm to 134mm lens for the focus lens. In the focus of the lens closer to the normal perspective and perspective, the scene deformation is small, suitable for shooting portraits, landscapes, travel commemorative photos and so on.
Telephoto lens: generally higher than 135mm lens for the telephoto lens, also known as telephoto lens. Among them, more than 300mm above the super telephoto lens. Telephoto lens perspective is small, perspective is weak, the scene deformation is small, suitable for shooting things can not be close, such as wild animals, stage, etc., you can also use telephoto lens virtual background role, shooting portraits.
Zoom lens because of its focal lengths change, bad general terms. Suppose its focal length in the wide-angle, medium coke, telephoto of a period or between the two changes, can also be called wide-angle zoom lens, medium-length zoom lens.
Magnification
The magnification is a lens that can increase the camera's optical zoom factor. If the optical zoom factor is not enough, we can add a magnification in front of the lens, the calculation method is like this, a 2 times the magnification, set in a 4 times the original optical zoom digital camera, then this digital The camera's optical zoom factor from the original 4 times to 8 times, that is, the multiples of the teleconverter and the optical zoom multiplication multiplied. But will reduce the corresponding effective aperture, such as 2 times the magnification will reduce the equivalent of 2 effective aperture. But most of the corresponding lens can still complete the shooting under auto focus.
Zoom lens is variable focal length, that is, you can push and pull the lens. In addition there is a fixed focus lens, that is, the focal length can not be changed only one focal length, or only one perspective.
In the appearance of the lens there are significant differences between the two, fixed focus lens only focus ring (that is, control clarity, later introduced), and zoom lens has two rings, a focus ring (control clarity) and zoom ring (control Perspective, ie push and pull).
Fixed focus lens
Wide-angle lens: generally less than 35mm lens for the wide-angle lens, less than 28mm for the ultra-wide angle lens. Wide angle lens wide, deep sense of strong, the scene will be deformed, more suitable for shooting larger scenes of photos, such as architecture, rallies and so on.
Medium focus lens: generally in the 36mm to 134mm lens for the focus lens. In the focus of the lens closer to the normal perspective and perspective, the scene deformation is small, suitable for shooting portraits, landscapes, travel commemorative photos and so on.
Telephoto lens: generally higher than 135mm lens for the telephoto lens, also known as telephoto lens. Among them, more than 300mm above the super telephoto lens. Telephoto lens perspective is small, perspective is weak, the scene deformation is small, suitable for shooting things can not be close, such as wild animals, stage, etc., you can also use telephoto lens virtual background role, shooting portraits.
Zoom lens because of its focal lengths change, bad general terms. Suppose its focal length in the wide-angle, medium coke, telephoto of a period or between the two changes, can also be called wide-angle zoom lens, medium-length zoom lens.
Magnification
The magnification is a lens that can increase the camera's optical zoom factor. If the optical zoom factor is not enough, we can add a magnification in front of the lens, the calculation method is like this, a 2 times the magnification, set in a 4 times the original optical zoom digital camera, then this digital The camera's optical zoom factor from the original 4 times to 8 times, that is, the multiples of the teleconverter and the optical zoom multiplication multiplied. But will reduce the corresponding effective aperture, such as 2 times the magnification will reduce the equivalent of 2 effective aperture. But most of the corresponding lens can still complete the shooting under auto focus.
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