Nikon PROSTAFF - Manual (Page 9)

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(7) Adjustable side focus
The PROSTAFF 5 Riflescope 3.5-14×40 SF, 3.5-14×50 SF, 4.5-18×40 SF, 3.5-14×50 SF IL and 4.5-18×40 SF IL can be more
precisely focused within the range of at least 45.72 m (50 yd) to infinity by rotating the side focus adjustment 1 (Fig. 3-9 or 3-10).
Parallax can be eliminated and sight alignment will be accurate.
Use its distance scale as a reference guide.
Fig. 3-9 Fig. 3-10
Note:
• The windage and elevation scales of the PROSTAFF 5 Riflescope 2.5-10Ч40, 2.5-10Ч50, 3.5-14Ч40 SF, 3.5-14×50 SF and 3.5-14×50 SF IL are calibrated in divisions of 1/4 minute of angle with a click at intervals
of 1/4 minute of angle (1 division).
• The windage and elevation scales of the PROSTAFF 5 Riflescope 4.5-18×40 SF and 4.5-18×40 SF IL are calibrated in divisions of 1/8 minute of angle with a click at intervals of 1/8 minute of angle (1 division).
• When adjusting the reticle to the point of aim, remember that 1 minute of angle equals approximately 2.54 cm (1 in) at 91.44 m (100 yd).
Therefore, if the impact point is 5.08 cm (2 in) low and 2.54 cm (1 in) right at 91.44 m (100 yd) Parallax Setting, you should adjust 2 minutes of angle up and 1 minute of angle left.
In the case of 45.72 m (50 yd) Parallax Setting, the adjusting value is 2×. In the case of 68.58 m (75 yd) Parallax Setting, the adjusting value is 1.5×.
PROSTAFF 5.indb 16-17 PROSTAFF 5.indb 16-17 2/8/2013 5:28:08 PM 2/8/2013 5:28:08 PM