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Epson powerlite 8300i Manual

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Appendix A: Projector Installation 113
Image Size Calculations (For All Lenses)
Use the formulas in this section to estimate the required screen size
and placement of the projector, depending on the type of lens with
which your projector is equipped. For all lenses except Rear Projection
Wide, the image size can be adjusted with the Zoom function, as
indicated by the minimum and maximum calculations.
Standard Lens (V12H004S02)
Image size: 22 to 600 inches (0.56 to 15.24 m)
Projection distance (focal range): 41 to 1218 inches (1.04 to 30.94 m)
■ To find the image size when you know the projection distance:
Maximum diagonal size = (0.6709 × projection distance) + 2.6
Minimum diagonal size = (0.4908 × projection distance) + 1.8
■ To find the projection distance when you know the image size:
Maximum projection distance = (2.037 × diagonal size) – 3.8
Minimum projection distance = (1.490 × diagonal size) – 3.8
Rear Projection Wide Lens (V12H004R02)
Image size: 55 to 120 inches (1.40 to 3.05 m)
Projection distance (focal range): 37 to 84 inches (0.94 to 2.13 m)
■ To find the image size when you know the projection distance:
Diagonal size = (1.399 × projection distance) + 3.6
■ To find the projection distance when you know the image size:
Projection distance = (0.7148 × diagonal size) – 2.6
Wide Zoom Lens (V12H004W02)
Image size: 40 to 600 inches (1.02 to 15.24 m)
Projection distance (focal range): 40 to 896 inches (1.02 to 22.76 m)
■ To find the image size when you know the projection distance:
Maximum diagonal size = (0.9454 × projection distance) + 2.5
Minimum diagonal size = (0.6671 × projection distance) + 1.7
■ To find the projection distance when you know the image size:
Maximum projection distance = (1.4990 × diagonal size) – 2.5
Minimum projection distance = (1.0578 × diagonal size) – 2.7
note
All variables are in inches.
The image size refers to the
diagonal dimension of a 4:3
image. If you need to
determine the diagonal of an
image from its width or
height, or work with
16:9-sized images, see
page 115.
… 113 …


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