WolfVision VZ-17 - Handbuch (Seite 8)

The working surface of the Visualizer (#9) has a special crystalline white color, which is
especially designed for perfect reproduction of transparencies.
Even though the professional Visualizers have a built-in bottom light it is recommended to
use the top light for transparencies, because of the better color reproduction and the
advantage that the Synchronized Lightfield still shows the pickup-area of the built-in
camera.
However in these situations it is recommended to use the bottom light:
- If the transparency is very dark
- If the transparency is very wavy and causes reflections
- If the room light causes reflections on a transparency
WORKING WITH TRANSPARENCIES
BOTTOM LIGHT / LASER CENTER MARKER
8
Please note that the macro mode has the following limitations:
- The depth of focus is not as large as in the fully extended position of the arm.
- The largest pick-up size is only about 42 x 33 mm (1.6" x 1.3").
- When zooming the Synchronized Lightfield stays at a larger size and no longer marks the pick-up area of the
built-in camera. As a substitute the Laser Center Marker (see above chapter) is activated.
If sufficient depth of focus in the macro mode is more important than big enlargements, it is possible to switch the
Visualizer from 12x zoom to 11x zoom in the Visualizer's menu (see page14). The smallest pick-up size in the 11x
macro mode is only 33 x 25mm (1.3" x 1"), but the depth of focus is larger than in the 12x macro mode.
MACRO MODE
Laser
center
marker
Laser
center
marker
Please note that for technical (optical) reasons the laser center marker can not show the exact middle center of the
pickup area in every position of the arm. This is not a failure of the unit! However it is always very close to the center.
This Laser Center Marker is only visible on the working surface and NOT on the picture the audience sees. For
safety reasons the Laser Center Marker is automatically switched off when the top mirror is tilted to record outside of
the working surface. If required the Laser Center Marker can also be switched off completely in the unit's menu (see
page 13 and on-screen help menu).
The LIGHT key (#21) can be used to switch between:
"Top light" (with Synchronized Lightfield)
"Bottom light" (with Laser Center Marker) and
"Light off"
The bottom light should be used for dark transparent materials such as x-rays or for
very small transparent materials such as slides.
Using the bottom light has the disadvantage that the Synchronized Lightfield of the top
light no longer marks the pick-up area of the built-in camera. However as a substitute
the Visualizers have a built-in Laser Center Marker, which marks the center of the pick-
up area. This can also be used for quick positioning of objects (especially with big
enlargements, like when picking up a slide)
In the fully extended position of the arm, the smallest
pick-up area is 42 x 33mm (1.6" x 1.3"). When pressing the
MACRO key (#18) the length of the arm is automatically reduced,
this allows for greater enlargements. In the macro mode the
smallest pick-up area is: 30 x 22mm (1.2" x 0.9").
There is no loss of resolution in the macro mode, as this is an
optical and not a digital zoom extension.
When the macro mode is activated the MACRO key on the control
panel is illuminated red.