NB: You will often find the previous setting was the best one, so the trick to
get one step back is by pressing the button four more times.
Switch off light
When reading glossy paper or self lighted displays like such o
f mobile phones,
then VisioBook’s light may cause reflections or blinding effects on the camera
image. In such cases you should switch off the light by a long press on the
image optimizer button. One more long press will switch the light back on
again.
Now, there is only one button left to explain. The auto focus button. This
sounds complicated, but is very easy to use.
When you switch on VisioBook, it is always in auto focus mode. That means,
no matter how thick a book or how curved a page, VisioBook will always focus
on the part displayed and thus always present a sharp image on the display.
So this is the setting you usually will prefer.
However, sometimes you want to fill in forms or crossword puzzles or you
want to paint your nails or view three-dimensional objects. This is where fixed
focus comes into play.
First, let us find that button. The auto focus button is the second button from
the left. Press it to toggle auto focus on and off. On the screen “AF ON“ or “AF
OFF” will be displayed for a few seconds respectively.
Let us test how this works. If you have already played with this button, press
the Auto Focus button once or twice and check for “AF ON” being displayed
to make sure, automatic focus is on. VisioBook will magnify the document
lying on base plate and display a sharp image. Put your hand on the
document now. VisioBook will magnify your hand and you see the skin of
your hand is focussed now while the characters on your document are
blurred. The same may happen when you want to fill in a form. Instead of
showing sharp letters, VisioBook may focus on the back of your hand holding
a pencil. If you remove your hand, the characters are sharp again.
So let us try the same with fixed focus now. Place a form on the base plate. If
VisioBook does not show sharp characters, press the auto focus button. “AF
ON“ will be displayed. Now that the characters are sharp, press the Auto
Focus button again to switch it off. “AF OFF“ will be displayed. If you fill in the
form with a pencil now, VisioBook will always stay in focus on the characters
and not on your hand. Once finished, do not forget to turn auto focus on
again by pressing the Auto Focus button.
13
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