VisioBraille Visio 500, User Manual, Page: 26 / 52

Control panel & Buttons 26
This button works in picture mode as well as in text mode.
Note: You will often find the previous setting was the best one, so the
trick to get one step back is by pressing the button three more times.
Switch off light
When reading glossy paper or self-lighted displays like such of mobile
phones, then Visio 500’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.
Autofocus
Visio 500 has a permanent autofocus which is always active at power on.
That means, no matter how thick a book or how curved a page might be,
Visio 500 will always focus on the part displayed and thus always
present a sharp image on the display. This feature is also helpful when
reading text on a curved surface, such as a can or a medicine bottle. 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. Visio 500 will magnify the
document on the reading table and display a sharp image. Put your hand
on the document now. Visio 500 will magnify your hand and you see the
skin of your hand is focused now while the characters on your document
are blurred. The same may happen when you want to fill in a form.