④
.
The Zoom times will be larger as U-Viewer USB handhold digital microscope is closer to the
observed object.
⑤
.
When the observed object is located at the top of the transparent cover, there are two focus
positions, each with different zoom times (250x and 50X), can be found by rotating the roller.
If you want 51X~249X zoom times, you must take off the transparent cover to adjust the
object distance.