There are several camera lens, Canon
Among them, more than 300mm above the ultra-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 blurred the background of the role of shooting portraits. Zoom lens because of its focal lengths change, bad general. Assuming 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. Can be found in
Fixed focus lens because of its focal length fixed, so the 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 construction, rallies and so on. Medium focus lens: generally in the 36mm to 134mm lens for the focus lens. In the lens is relatively close 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.
Specifically, the lens is divided into zoom and fixed focus two categories. Zoom lens we have just tried, that is, the focal length is variable, 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, that is, push and pull).
