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Throw Distance Calculation
The TransVision’s
™
zoom lens allows for a wide range of throw distance options – the distance from
the projector to the screen. For maximum flexibility in adjustment we recommend that, where possible,
the projector be installed in the middle range of the possible distances. However, the unit may be
installed at any point within the allowable range.
q
To obtain the minimum throw distance, multiply the screen width by 1.4.
q
To obtain the maximum throw distance, multiply the screen width by 2.2.
Screen Offset
The screen offset is the distance between the top of the picture area of the screen and the ceiling. This
distance is important and it should be calculated before the screen is installed to ensure proper
positioning of the projector in relation to the screen. Incorrect screen offset may cause image keystone
distortion and cannot be compensated either with the mounting system or electronically.
Screen offset will vary according to the aspect ratio of the screen and the screen width.
For screens with a 4:3 aspect ratio the offset is within a range of approximately six to eight inches.
For screens with a 16:9 or 15:9 aspect ratio the minimum offset is six to eight inches, and may be
increased using the “
V.Position
” setting option in the
Screen Setup
menu. The maximum screen offset
for wide aspect ratio screens may be calculated using the following formulas:
For 16:9 screens, multiply the screen width by 0.19 + 6”
For 15:9 screens, multiply the screen width by 0.15 + 6”
Note that the mounting system enables you to make small adjustments to the vertical tilt without
introducing visible keystone distortion.
For floor-mounted installations the picture offset is the distance between the mounting surface of the
projector and the bottom of the picture. In order to deliver pictures that are free of keystone distortion,
be certain to calculate the offset distance before ordering screens and/or cabinetry. Although some
adjustment range is available in floor mounted systems by using the adjustable feet, it is always better
to use the least amount of mechanical adjustment necessary.
