Do you Know the Extension of a Prime Lens?

As a Car Camera Lens Manufacturer, share with you.

A prime lens refers to a lens with only a fixed focal length. There is no focal length, or only one field of view. The fixed focus lens has no zoom function.

The design of a fixed focus lens is much simpler than that of a zoom lens, but the general zoom lens will affect the imaging during the zooming process. The biggest advantage of a fixed focus lens over a zoom machine is that the focusing speed is fast and the image quality is stable. Many digital cameras with fixed-focus lenses have clear and stable images of moving objects, very accurate focus, delicate images, very slight graininess, and relatively accurate metering.

Fixed Focal Length Lenses

Another focus of the lens is the zoom capability. The so-called zoom capability includes two types: optical zoom and digital zoom. Although both are helpful for magnifying distant objects during telephoto shooting, only the optical zoom can support the image of the subject, adding more pixels, making the subject not only larger, but also relatively clearer. Generally, the larger the zoom factor is, the more suitable it is for telephoto shooting. The optical zoom is the same as the traditional camera design, depending on the focal length of the lens, so the resolution and image quality will not change. Digital zoom can only reduce the size of the original image, making the image larger on the LCD screen, but it will not help to make the details clearer.

Optical zoom is produced by changes in the positions of the lens, object, and focus. When the imaging surface moves in the horizontal direction, the vision and focal length will change, and the farther scene becomes clearer, which makes people feel like the object is progressive.

Obviously, there must be two ways to change the angle of view, one is to change the focal length of the lens. In photography terms, this is optical zoom. The focal length of the lens is changed by changing the relative position of each lens in the zoom lens. The other is to change the size of the imaging surface, that is, the diagonal length of the imaging surface is in digital photography, which is called digital zoom. In fact, digital zoom does not change the focal length of the lens, but only changes the angle of view by changing the angle of the imaging face, thus producing an effect that is "equivalent to" the focal length of the lens.

Our company also has Fixed Focal Length Lenses on sale, welcome to contact us.