Newcon Optik NVS 4 - Manual (Page 12)

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Note: If zeroing range is different, the value of click changes
proportionally, for example:
-
at range 50 m - 1.5 cm;
- at range 200 m - 6.0 cm.
Example: On the Fig.3 the mean point of impact is located
above the aiming point by 15 cm and at the left by 20 cm. To
shift the mean point of impact to target centre one should turn
the vertical adjustment screw by 15/3 = 5 clicks down and the
horizontal adjustment screw by 20/3 = 7 clicks to the right.
Make the batch of check shooting.
Grouping of scope aimed shooting should not be worse than
without the scope. No adjustment should be made after
zeroing. When shooting a range exceeding 100 m you should
keep zeroing but choose another aiming point corresponding
to the distance to the target.
Figure 3.