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Definition of Optical Zoom in Projectors

By XGIMI Tech - 2024-4

How Does Projector Zoom

Here are two types of zooming in a projector. One is optical zoom, another is digital zoom. There are many differences between them. Put simply, the optical zoom is zooming with a physical method and the digital zoom is zooming with software or applications.

The photo compares the optical zoom and digital zoom.

Optical Zoom

Optical zoom utilizes the principles in optical imaging to achieve zoom and is therefore also known as optical zoom. Digital video cameras basically rely on optical zoom to achieve focus. This is mainly because of the structure of the optical lens changes, that is, through the camera inside the optical lens to realize the position of the camera after the movement of the scene to capture the image of the magnification and reduction, when the image plane in the lens, the object and the focal point of the horizontal direction between the movement, the angle of view and the focal length will change accordingly, and the lens according to this change in the zoom to make the farther away from the scene to become clear, which is the optical zoom. The greater the optical zoom, the farther the lens is able to see.

The projector and camera optical zoom principle are the same, through the physical displacement of the lens element to realize the zoom. But they zoom for different purposes; the camera zooms in to act on the object, cropping the picture by zooming in and out. The projector uses optical zoom to succeed if the projector does not move the projector's position without losing picture quality to enlarge the projected image.

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Advantages of Optical Zoom

Optical zoom-in projectors offer several advantages, enhancing flexibility and performance in various scenarios. Here are some key advantages:

● Variable Magnification: Optical zoom allows users to adjust the size of the projected image without compromising image quality. This flexibility is particularly useful in environments where the distance between the projector and the screen is variable.

● Maintained Image Quality: Unlike digital zoom, which enlarges the pixels in the image and may result in a loss of image quality, optical zoom maintains image clarity throughout the zooming process. This is because optical zoom physically adjusts the lens elements to alter the focal length.

● Better Control Over Projection Size: Optical zoom gives users precise control over the size of the projected image, enabling them to match the content to the audience size and viewing conditions. This is beneficial in various settings, such as conference rooms, classrooms, or large auditoriums.

● Improved Flexibility in Setup: When setting up a projector in different locations or for various purposes, optical zoom provides the convenience of adjusting the image size without the need for extensive recalibration or repositioning of the projector.

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You can easily set up XGIMI HORIZON Ultra watching a favorite movie at home immersively with a super large screen.

XGIMI high-end projector HORIZON Ultra

In summary, optical zoom-in projectors offer advantages in terms of flexibility, image quality, and ease of use, making them a valuable feature for users who require adaptability in various presentation or entertainment settings.

Projector Recommendations


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  • Dual Light Technology
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  • Dual 12W Harman Kardon Speakers
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