Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size.

The projector should always be placed horizontally level (like flat on a table), and positioned directly perpendicular (90° right-angle square) to the horizontal center of the screen. This prevents image distortion caused by angled projections (or projecting onto angled surfaces).

If the projector is mounted on a ceiling, it must be mounted upside-down so that it projects at a slightly downward angle.

You can see from the diagrams on page 17, that this type of projection causes the bottom edge of the projected image to be vertically offset from the horizontal plane of the projector. When ceiling mounted, this refers to the top edge of the projected image.

If the projector is positioned further away from the screen, the projected image size increases, and the vertical offset also increases proportionately.

When determining the position of the screen and projector, you will need to account for both the projected image size and the vertical offset dimension, which are directly proportional to the projection distance.

BenQ has provided tables of 16:9-aspect-ratio and 4:3-aspect-ratio screen sizes to assist you in determining the ideal location for your projector. There are two dimensions to consider, the perpendicular horizontal distance from the center of the screen (projection distance), and the vertical offset height of the projector from the horizontal edge of the screen (offset).

How to determine the position of the projector for a given screen size

1.Determine the aspect ratio of your screen, 16:9 or 4:3? If you have a 16:9 screen, refer to page 17. If you have a 4:3 screen, refer to page 18 depending on the projected picture aspect ratio you’ve got.

2.Select your screen size.

3.Refer to the table on page 17 and find the closest match to your screen size in the left columns labelled "(a) Screen size". Using this value, look across this row to the right to find the corresponding average distance from screen value in the column labelled "(b) Distance from screen". This is the projection distance.

4.On that same row, look across to the right column and make note of the "(c) Vertical offset" value. This will determine the final vertical offset placement of the projector in relation to the edge of the screen.

5.The recommended position for the projector is aligned perpendicular to the horizontal center of the screen, at the distance from the screen determined in step 3 above, and offset by the value determined in step 4 above.

For example, if you are using an 120-inch, 4:3-aspect-ratio screen and the projected picture is 16:10, please refer to Table B2 on page 18, the recommended projection distance is 1192 mm and the vertical offset is 76 mm.

How to determine the recommended screen size for a given distance

This method can be used for situations where you have purchased this projector and would like to know what screen size will fit in your room.

The maximum screen size is limited by the physical space available in your room.

Positioning your projector

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BenQ MP782 ST user manual Obtaining a preferred projected image size
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MP782 ST specifications

The BenQ MP782 ST is a versatile short-throw projector designed to enhance presentations and multimedia experiences in both classroom and corporate settings. This projector stands out for its high-definition display capabilities, compact design, and user-friendly features.

One of the key features of the MP782 ST is its short-throw projection technology. The projector can produce a large image from a short distance, allowing users to place it close to the wall or screen while still achieving a screen size of up to 100 inches. This makes it ideal for smaller rooms where space can be a constraint. The ability to project in tight spaces means that the audience can be closer to the image without the risk of casting shadows or obstructing the view.

In terms of image quality, the MP782 ST boasts a native resolution of 1280x800 (WXGA) and a brightness level of 3000 ANSI lumens. This combination ensures that images and presentations are clear and vibrant, even in well-lit environments. Additionally, the projector features a contrast ratio of 4000:1, allowing for deeper blacks and more vivid colors, which enhances the overall visual experience.

The MP782 ST is equipped with several advanced technologies that contribute to its impressive performance. Its SmartEco technology optimizes lamp power and extends the lifespan of the lamp up to 6000 hours, reducing maintenance costs and ensuring reliability during long presentations. Furthermore, the projector utilizes BrilliantColor technology, which enhances color accuracy and delivers more realistic images across various media types.

Connectivity is another strong suit of the BenQ MP782 ST. It features multiple input options, including HDMI, VGA, and USB, making it compatible with a variety of devices such as laptops, Blu-ray players, and document cameras. This versatility allows users to seamlessly integrate the projector into their existing technology setup.

The design of the MP782 ST also includes practical features for ease of use. It has a low fan noise level, ensuring that it operates quietly during presentations. Additionally, its lightweight construction makes it easily portable, allowing for flexibility in different settings, whether it be a classroom, conference room, or training facility.

Overall, the BenQ MP782 ST is a dynamic projector that combines short-throw technology, high brightness, and robust connectivity options to deliver a reliable and impressive presentation experience. Its thoughtful design and advanced features make it a strong choice for educators and business professionals alike, facilitating engaging and effective communication.
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