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.

4:3 is the native aspect ratio of this projector. To be able to project a complete 16:9 (widescreen) aspect ratio image, the projector can resize and scale a widescreen image to the projector's native aspect width. This will result in a proportionally smaller height equivalent to 75% of the projector's native aspect height.

4:3 aspect image in a 4:3

aspect display area

Darkened bar (12.5% height)

Darkened bar (12.5% height)

16:9 aspect image scaled to a 4:3 aspect display area

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 a table of 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.Select your screen size.

2.Refer to the table on page 17 and find the closest match to your screen size in the left columns labelled "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 "Average". This is the projection distance.

Positioning your projector

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BenQ MP515 ST, MP525 ST user manual Aspect image in a Aspect display area, Select your screen size
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MP515 ST, MP525 ST specifications

The BenQ MP525 ST and MP515 ST are innovative projectors designed to deliver high-quality visuals for both educational and business environments. With a blend of advanced technologies and user-friendly features, these projectors offer exceptional performance.

Starting with the core characteristics, both models boast DLP (Digital Light Processing) technology, which ensures sharp images with vibrant colors and excellent contrast ratios. The native resolution of these projectors is XGA (1024 x 768), suitable for detailed presentations and videos. The brightness level for the MP525 ST is typically around 2500 ANSI lumens, providing sufficient illumination for well-lit environments. The MP515 ST, while slightly less bright, still delivers adequate performance for dimly lit rooms, making both models versatile for various settings.

One of the standout features of the BenQ MP525 ST is its short-throw projection capability, allowing users to display large images from a short distance. This is particularly beneficial in smaller rooms where space is limited as it minimizes shadows and enables presenters to stay close to their audience. The throw ratio is approximately 0.6:1, meaning it can project a large image within just a few feet from the screen.

Both projectors come equipped with a comprehensive connectivity suite, including HDMI, VGA, S-Video, and composite video inputs, ensuring compatibility with a wide range of devices such as laptops, DVD players, and gaming consoles. They also feature built-in speakers that deliver clear audio without the need for external sound systems, making them convenient for quick setups.

In terms of usability, the BenQ MP525 ST and MP515 ST are designed with user-friendly interfaces and remote controls. They include features like keystone correction to help adjust the image shape, ensuring perfect alignment even when the projector is angled. Additionally, the projector’s lamp life is impressive, reaching up to 4000 hours in economic mode, which reduces the need for frequent replacements and lowers operational costs.

In conclusion, the BenQ MP525 ST and MP515 ST projectors are excellent choices for educators and presenters who require flexibility, quality, and ease of use in their projection equipment. With their advanced DLP technology, short-throw capabilities, and versatile connectivity options, these models cater to diverse presentation needs while ensuring that every image is displayed with clarity and impact.
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