Canon D78-5532, Service Manual, Page: 14 / 119

4. FUNCTIONS
4.1 Optics
●
Zoom/Focus
This projector has a projection lens with a 1.6
×
zoom ratio.
Zoom and focus are adjusted manually.
●
Projection distance and projection screen size
These products are capable of projecting accurately at distances between 1.0 and 7.7
meters.
Note that the displayable screen size ranges from 40 to 300 inches.
* The quantities H1 and H2 represent heights of the top section and bottom section of the
screen if the screen is divided vertically along a line level with the projector's lens axis. The
ratio of H1 to H2 is 9:1.
4.2 Images
●
Image mode selection (by remote control)
This function selects the optimum gamma characteristic for the relevant video
content, by signal type.
The video modes shown in the table below are available.
This projector is equipped with blackboard mode, which is completely new.
• Standard (for computer and video input)
This setting works with general.
• High contrast (for computer input)
This mode brightens mid-range areas making the overall image appear brighter.
The High-contrast Mode can reproduce low-range arias clearly even in brightly lit
environments.
• Cinema (for video input)
This mode boosts dark areas, improving the reproduction of dark pictures.
In effect, this improves the expressiveness of scenes with many dark areas,
common in movies, by preventing black saturation.
Part 1: General Information
1-5
0.81 × 0.61 2.03 × 1.52 3.05 × 2.29 3.86 × 2.90 6.10 × 4.57
1.00 2.54 3.82 4.85 7.68
1.59 4.02 6.04 7.66 –
55 137 206 261 411
6 15 23 29 46
Size [m]
Zoom min
Zoom max
Projection
Distance [m ]
Screen 40" 100"
150" 190" 300"
H1 [cm]
H2 [cm]
Computer input Standard High contrast Blackboard (Green)
Video input Standard Cinema Blackboard (Green)
Custom
Custom