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What is projector zoom and what are the advantages and disadvantages of the zoom function?

  • 2022-04-25
What is the meaning of projector zoom

Zoom refers to the function of changing the size of the projector screen, which is divided into optical zoom and digital zoom.

Optical zoom: The function of adjusting the size of the picture by changing the position of the lens inside the projection, that is, adjusting the zoom ring of the projector to zoom the picture. Such a zoom function does not affect the image quality of the projected image.

Digital zoom: When the projector is a fixed-focus lens, it is impossible to adjust the lens position to zoom, so there is a digital zoom function. Through the internal processing chip of the projector or through the algorithm to simulate the zoom, the display range can be reduced according to a certain proportion, so only the screen can be reduced, and it cannot be enlarged beyond the original screen. The digital zoom function will affect the resolution of the picture, which may cause the picture to be unclear.

What are the advantages and disadvantages of the zoom function

optical zoom

Advantages: The ability to adapt to space is stronger, and it can project a larger picture at a short distance without damaging the picture quality.
Disadvantages: high cost, loud noise, large size.



digital zoom

Advantages: low cost, small size, low noise.
Disadvantages: damage to the picture quality, only the picture can be reduced, and dark shadows will be left around the picture.

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