ViTiny VT300 PLUS - Optical and Digital Magnification Explained; Magnification Stage Details

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The following images are presented while charging
 USB Source : the graphic will be presented under two
circumstances. One is insert USB power supply without
using battery, and the other is insert USB source and use
full-charged.
(F) Optical Digital Magnification : represents current
magnification rate.
 The optical zooming rate will be changed while adjusting
the black indicator on the wheel of Focus. Please refer to the
following.
Low Mag.(L)
High Mag.(H)
 Digital magnification rate can be adjusted by the buttons of
zoom out ( ) and zoom in ( ). The magnification is
divided into 8 stages and can be up to 4 times with 0.5 times
per stage. The image can be enlarged to 55 times when
combining optical and digital magnifications. The rates at
different stage are as follows:
10x optical rate [11* (1+0.5*stage)]
Stage
1
2
3
4
Rate
16x
22x
27x
33x
Stage
5
6
7
8
Rate
38x
44x
49x
55x
Note: this formula is for 0-8 stages.