A must-see for novices. Have you heard all this knowledge about the lens?
Many novice photographers choose kits when they buy a camera, because most novices don’t have a concept of the lens, so they cannot directly understand their needs. In fact, different selected lenses have very different feelings for photography, and the sense of picture they bring is also completely different. Today, we will introduce to you the knowledge about the lens and help the novice choose the lens that suits them.
fixed focus lens and zoom lens
If you simply classify the lens, it can be divided into fixed focus lens and zoom lens Two major categories.
A fixed focal length lens is a lens with a fixed focal length. For example, a Nikon Z 85mmF1.8 lens has a fixed focal length of 85mm. If you want to change the distance to the subject using a prime lens, you have to walk around by yourself. Fixed focus lenses generally have the characteristics of a large aperture, such as F2.0, F1.8, F1.4, F1.2 and so on. Relatively speaking, fixed-focus lenses can provide better picture quality than zoom lenses, but not every fixed-focus lens has such characteristics.
zoom lens is a lens whose focal length can be changed, such as the Nikon Z 24-70mmF2.8 lens, whose focal length can be changed between 24 and 70mm. Users can stand in place and directly shoot different images supported by the lens focal length.
The distinction between wide-angle, standard, and telephoto lenses
If it is distinguished by focal length Lenses can be divided into fisheye lenses, wide-angle lenses, standard lenses, telephoto lenses and super telephoto lenses. How to distinguish these classifications, let’s look down.
fisheye lens, generally the focal length of less than 16mm can be called fisheye lens, such as
wide-angle lens, generally the focal length is greater than 16mm and less than 35mm, it can be called a wide-angle lens, such as Nikon Z 14-30mmF4 lens;
standard lens, generally the focal length is greater than 35mm and less than 70mm, it can be called a standard lens, such as Nikon Z 50mm F1.8 lens;
telephoto lens, generally the focal length is greater than 70mm and less than 200mm, it can be called a telephoto lens, such as Nikon Z 70-200mmF2.8 lens;
Super telephoto lens, generally the focal length is greater than 200mm, it is called super telephoto lens, such as 100-400mm, 400mm, 600mm, 800mm these focal length lenses belong to super telephoto lens.
What is a “big three yuan” lens
we can always hear “big “Three yuan” lens is the name of a set of lens combinations that you should have when entering high-end photography. The “big three yuan” lens refers to the collective name of three zoom lenses with a constant F2.8 aperture. The focal length ratios of these three lenses are 16-35mm, 24-70mm, 70-200mm.
The general “big three yuan” lens is a very good zoom lens, so the performance in terms of image quality is very good, even better than some fixed focus lenses.
What is a “small three yuan” lens
“small three yuan” lens corresponds to the “big three yuan” lens Yes, it is composed of three zoom lenses with a constant aperture of F4, and their focal lengths are still 16-35mm, 24-70mm, 70-200mm. Generally, after advanced photography, if the funds are insufficient, they will choose to buy the “small three yuan” lens, and users with strong financial strength will choose to buy the “big three yuan” lens.
lens aperture is the part that controls the amount of light, The composition of the aperture blades also controls the blur effect of the picture. The larger the aperture, the smaller the value, such as F1.2, F2.0, the larger the amount of light entering, the more obvious the blur effect of the picture; the smaller the aperture, the larger the value, such as F8, F11, the smaller the amount of light entering, the virtual image The less obvious the chemical effect. The aperture value of each lens will be marked on the lens.
The aperture of a lens is divided into a constant aperture and a variable aperture in addition to the size. The aperture mentioned here is the maximum aperture value that the lens can reach, not that the lens has only this aperture available.
General fixed focus lenses have a constant aperture, such as 50mmF1.2, 85mmF1.2, etc. The “big three yuan” and “small three yuan” lenses introduced above and a few zoom lenses are also available Constant aperture characteristics, such as 70-200mmF2.8, 24-105mmF4, etc.
But many entry-level lenses are variable aperture, that is, their maximum aperture will change with the change of focal length, such as Nikon Z 24-200mm F4 -6.3, the aperture can be changed from F4 to F6.3.
As mentioned above, in addition to controlling the amount of incoming light, the aperture also controls the blur level. Another feature of the blur effect is the light spot. The more the number of aperture blades in the lens, the closer the aperture will be to a circle. Shape, which is also liked by users.
When purchasing a lens that adapts to the mount
many novice users, Due to limited funds, you may not necessarily buy a lens with the same brand as the camera, that is, an original lens. The original lens has the best quality and compatibility, but the price is more expensive. Many users will choose lenses from Japanese sub-factory brands such as Tamron and Sigma, or domestic brands such as Zhongyi Optics, Lao Frog, etc. Therefore, when buying, they must prescribe the right remedy and purchase lenses with corresponding mounts.
For example, the mount of Canon SLR cameras is EF, the mount of full-frame mirrorless cameras is RF; the mount of Nikon SLR cameras is F, the mount of full-frame mirrorless cameras is Z, Sony The format mirror is FE and so on. Every camera brand has its own bayonet system, so when you buy it, you must go to the official website to check the bayonet of your camera before buying.
For novices, it’s really no problem to choose a kit for the first lens, because although the kit does not have the characteristics of a large aperture, the focal length coverage is more comprehensive. Users can find the focal length and photography type they are good at, and then choose the lens according to their needs to avoid wasting money. Finally, I wish you all a happy photography.
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