So you get a nice contrast!
1. first insert the unwinding device.
2. then insert the glass.
3. align the unwinder - left side - right side
4. align the glass horizontally
5. fix glass with tabs
6. do not forget to focus!
7. please do NOT insert the unwinding device!
Then with the hand
turn the unwinding wheels by hand
to check whether the glass can be turned easily without slipping!
