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

1.Select your screen size.

2.Refer to the table and find the closest match to your screen size in the left columns labelled '4:3 Screen Diagonal'. Using this value, look across this row to the right to find the corresponding average distance from screen value in the column labelled 'Average'. This is the projection distance.

3.On that same row, look across to the right column and make note of the vertical Offset value. This will determine the final vertical offset placement of the projector in relation to the edge of the screen.

4.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 2

above, and offset by the value determined in step 3 above.

For example, if you are using a 120 inch screen, the average projection distance is 4467 mm and with a vertical offset of 183 mm.

If you place the projector in a different position (to that recommended), you will have to tilt it down or up to center the image on the screen. In these situations, some image distortion will occur. Use the Keystone function to correct the distortion. See "Correcting keystone" on page 29 for details.

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.

1.Measure the distance between the projector and where you want to position the screen. This is the projection distance.

2.Refer to the table and find the closest match to your measurement in the average distance from screen column labelled 'Average'. Check that your measured distance is between the min and max distances listed on either side of the average distance value.

3.Using this value, look across that row to the left to find the corresponding screen diagonal listed in that row. That is the projected image size of the projector at that projection distance.

4.On that same row, look across to the right column and make note of the vertical Offset value. This will determine the final placement of the screen in relation to the

horizontal plane of the projector.

For example, if your measured projection distance was 4.5m (4500mm), the closest match in the Average column is 4593 mm. Looking across this row shows that a 3000 mm (3 m) screen is required. If you can only obtain imperial sized screens, the listed screen sizes on either side of the 3 m screen are the 9' and 10' screens.

Checking the min and max projection distance values for these screen sizes, indicates that the 4.5 m measured projection distance will need to be reduced to fit the 9' size screen, or increased to fit the 10' size screen. The projector can be adjusted (using the zoom control) to display on these different screen sizes at those projection distances. Be aware that these different screens have different vertical offset values.

Positioning your projector

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BenQ MP721C user manual Positioning your projector
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MP721C specifications

The BenQ MP721C is a versatile and reliable multimedia projector designed to meet the needs of various presentation environments, making it an ideal choice for both educational and business settings. With a bright output and an array of features, the MP721C enhances the viewing experience, ensuring that every detail is clear and impactful.

One of the standout features of the BenQ MP721C is its impressive brightness level, measuring at 2400 ANSI lumens. This high lumen output means that the projector can be used effectively in well-lit rooms without sacrificing image quality. The resolution of 1024 x 768 (XGA) allows for crisp and clear images, making it suitable for displaying detailed presentations, videos, and graphics.

The MP721C employs DLP technology, known for its reliability and consistent performance. This technology also contributes to the projector's ability to produce rich colors and deep blacks, enhancing the overall visual experience. Furthermore, the BenQ MP721C includes a built-in speaker that offers decent audio, so users can deliver presentations without the need for external sound systems.

The connectivity options of the MP721C are robust, featuring multiple input ports such as VGA, composite video, and S-Video, ensuring compatibility with a wide range of devices including laptops, cameras, and DVD players. Additionally, the projector includes USB connectivity, allowing users to display images directly from USB drives.

The projector is designed with user convenience in mind. It offers features such as automatic vertical keystone correction, which helps to eliminate image distortion when the projector is not perfectly aligned with the screen. The easy-to-use on-screen menu simplifies the process of adjusting settings, making it accessible for presenters of all technical skill levels.

Moreover, the BenQ MP721C is energy-efficient, with a long lamp life that can reach up to 4000 hours in economic mode, reducing maintenance costs and downtime. Its compact and portable design makes it easy to transport, allowing for quick setup in different locations.

In summary, the BenQ MP721C is an adaptable projector, combining brightness, connectivity, and user-friendly features. Whether in the classroom or a boardroom, it provides an effective solution for making presentations stand out, while ensuring reliability and longevity for regular use.
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