Why the sharpness of the zoom is not as good as that of the fixed focus

More lenses will cause dispersion, more lenses in zoom are naturally blurred, less lenses in prime lenses are natural and clear, in the same environment, the clarity of the object you focus on is better than that of zoom. Therefore, the more lenses, the lower the clarity.

Under the condition of limited cost (card machine cost is low), prime lenses are easy to manufacture due to their relatively simple structure. Aberrations are easier to control. However, due to the need to take into account the image effect of each focal length segment, the zoom lens can only use a compromise method to make the resolution meet the subjective requirements of ordinary users.

In addition, LZ's 12000 pixels are not clear.

Lenses cause dispersion, dividing monochromatic light into different colors of light, and because the light transmittance is less than one, the lens will reduce the brightness of the light, making the light received by the image sensor (CMOS CCD) darker and less clear. Therefore, the more lenses, the lower the clarity.

In the same environment, the sharpness of the object you focus on is better than that of the zoomed. Of course, the number of pixels of each camera has its own definition.

Because there are fewer lenses in the prime lens, the scattering and refraction of light is less, and the image is natural and clear.

There are many lenses in the zoom, which is not clear.

There are many zoom lenses, and the image is not clear after scattering.

Sent to the Assad launch point.

There is a difference in lens diameter. Larger lenses are clearer. Ever seen the cannon barrel on the side of the pitch?

1. The design structure of the fixed focal length lens is much simpler than that of the zoom lens, and the simpler structure of the zoom lens determines that its imaging is sharper and clearer, and the imaging is stable.

2. The prime lens has a larger aperture at the same focal length as the zoom lens (this is designed), which makes the fixed focus lens better blur the background and have softer blur imaging.

3. Due to the problem of each focal length, the distortion (image distortion) of the zoom lens is more serious than that of the fixed focus lens during wide-angle imaging.

is like Liu Xiang, 110 meters hurdles strong. If he is allowed to do x x and marathon, will he be able to do it? Lewis may be able to run an x100, Ma Jiajun can run a marathon, but it is impossible to be all-round

It's okay to win the world championship, and it's a three-legged cat at best.

The same is true for lens imaging, there is no optical structure with large zoom, large aperture, and good imaging, not to mention the imperfections of chemistry, physics, metallurgy, processing and other links involved in the manufacturing stage, resulting in a decline in imaging.

If you want to know the theoretical basis for good or bad imaging, you have to read the theory books on optics and glass grinding.

It's the same thing, strictly speaking, it should be to adjust the sharpness of the subject in the frame, depending on what kind of depth of field you want.

Focusing is to adjust the size casually, and focusing is to adjust the focal length more accurately.

Focusing and focusing are the same thing, and the image is the sharpest only when it is in focus.

1. Focusing is the process of adjusting the camera lens to make the image to be shot clear or blurry.

2. Convergence is to adjust the lens of the camera, when the image being taken is the clearest, it is in focus.

It's easy for beginners to confuse focus and zoom.