BenQ DLP PROJECTOR PE8700 - Manual (Page 13)

12
A9. ZOOM RATIO
Unit: Ratio : 1
Brightness: Default
Contrast: Default
Zoom ratio = maximum / minimum image diagonal size at a fixed projection
distance.
A10. FOCUS RANGE
Unit: m (Max~Min)
Brightness: Default
Contrast: Default
The minimum/maximum focus distance is the minimum/maximum projection
distance (front side projection lens and the image lane), expressed in meter,
at which the image is still at its best for focus.
A11. COLOR
Unit: x, y
Measurements at the center (except in the case of color uniformity
measurements) of a screen which is entirely of the color being measured and
at default brightness and contrast
settings.
A12. COLOR UNIFORMITY
Unit: x, y
Difference between any two points out of Lx and Ex should not exceed the
specification for the given color.
A13. OPTICAL KEYSTONE (FIXED)
Unit: %
Brightness: Default
Contrast: Default
Measure the dimensions W1, W2 and W3 at the half image height, as shown
above. The distortion is defined as:
% 100 *
3
3 1
W
W W
dist TV
−
= −
& % 100 *
3
3 2
W
W W
dist TV
−
= −