Nikon Monarch Gold (E) - Manual (Page 8)

(5) Adjustable objective
The Nikon Monarch Gold (E), 2.5-10x50 SF and 2.5-10x56 SF can be more precisely focused within the
range of at least 50 yards (45.72 m) ~ infinity by rotating the Side Focus adjustment ring.
Parallax can be eliminated and sight alignment will be accurate.
Use its distance scale as a reference guide.
The Side Focus adjusting ring has a locking system.
To loosen locking system, pull the Side Focus adjustment ring out. (Fig. 3-9)
Then set the parallax free distance and push the adjusting ring in to lock the ring.
Maintenance
(1) Lens cleaning
To remove dirt or fingerprint, soak gauze or lens cleaning paper (silicon-free paper sold at camera shop)
with a small quantity of absolute alcohol (available from drugstore) and lightly wipe off. Wiping with leather
chamois is not recommended as it is likely to damage the lens surface.
Dust may scratch the lens surface or corrode the lens.
Brush dust off using a soft oil-free brush.