Leica Digiscoping-Adapter Notice D'utilisation page 30

EN
6. Diopter setting
This setting only needs to be done once; it can be used for all
photos with the camera concerned and it allows simple changing
between photography and watching without having to refocus. The
diopter setting can be read on the little scale.
A
Note:
Loosen clamping screw as far as you can.
Important:
Do not turn the clamping screw any further beyond the resistance!
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