Vaddio EVI-D80D90 Tech - Manual (Page 8)

8
Basic Functions
Overview of Functions
Zoom
EVI-D80N/P:
The camera employs a 18× optical zoom lens
combined with a digital zoom function; this camera
allows you to zoom up to 216×.
• Optical 18×, f = 4.1 mm to 73.8 mm (F 1.4 to F 3.0)
The horizontal angle of view is approximately 48.0
degrees (wide end) to 2.8 degrees (tele end).
Digital Zoom enlarges the center of the subject by
expanding each image in both the vertical and
horizontal directions. When 216× zoom is used, the
number of effective picture elements in each direction
reduces to 1/12 and the overall resolution deteriorates.
EVI-D90N/P:
The camera employs a 28× optical zoom lens
combined with a digital zoom function; this camera
allows you to zoom up to 336×.

Optical 28×, f = 3.5 mm to 98.0 mm (F 1.35 to F 3.7)
The horizontal angle of view is approximately 55.8
degrees (wide end) to 2.1 degrees (tele end).
Digital Zoom enlarges the center of the subject by
expanding each image in both the vertical and
horizontal directions. When 336× zoom is used, the
number of effective picture elements in each direction
reduces to 1/12 and the overall resolution deteriorates.
You can activate the zoom in the following two ways

By pressing the ZOOM buttons on the Remote
Commander
 Using a VISCA Command
Using Standard Mode
Using Variable Mode
There are eight levels of zoom speed.
Direct Mode
Setting the zoom position enables quick
movement to the designated position.
Digital Zoom ON/OFF
In these standard and variable Speed Modes, it is
necessary to send Stop Command to stop the zoom
operation.
Focus
Focus has the following modes, all of which can be set
using VISCA Commands.

Auto Focus Mode
The minimum focus distance is 10 mm at the optical
wide end and 800 mm (EVI-D80N/P), 1500 mm
(EVI-D90N/P) at the optical tele end, and is
independent of the digital zoom. The Auto Focus
(AF) function automatically adjusts the focus
position to maximise the high frequency content of
the picture in a center measurement area, taking into
consideration the high luminance and strong
contrast components.
- Normal AF Mode
This is the normal mode for AF operations.
- Interval AF Mode
The mode used for AF movements carried out at
particular intervals. The time intervals for AF
movements and for the timing of the stops can be
set in one-second increments using the Set Time
Command. The initial value for both is set to five
seconds.
- Zoom Trigger Mode
When the zoom is changed with the ZOOM
buttons on the Remote Commander, the pre-set
value (initially set at 5 seconds) becomes that for
AF Mode. Then, it stops.
AF sensitivity can be set to either Normal or LOW.
- Normal
Reaches the highest focus speed quickly. Use this
when shooting a subject that moves frequently.
Usually, this is the most appropriate mode.
- LOW
Improves the stability of the focus. When the
lighting level is low, the AF function does not take
effect, even though the brightness varies,
contributing to a stable image.