Nikon 2.5-10x40 Instruction Manual page 7

How to adjust illumination intensity
En Turn the rheostat intensity dial to the desired color (red or green) and intensity (6 steps: OFF to 5) (Fig. 3-3).
*The Nikon PROSTAFF 5 Riflescope comes with a 3V lithium battery (CR2032).
*Replace the battery if the Nikon PROSTAFF 5 Riflescope is ever submerged in water or if water enters the battery chamber.
12
(2) Focusing
1 Look through the eyepiece with your eye positioned about 10 cm (4 in) away from the eyepiece to see the BDC reticle (Fig. 3-4),
2 Point the objective end of the scope at the sky (NOT point it at the sun) or at a plain unpatterned wall.
3 Turn the eyepiece adjustment counter-clockwise and then turn it clockwise until the reticle appears sharp.
Fig. 3-3
(3) Magnification
• The PROSTAFF 5 Riflescope has variable magnification. For details, see "2. Specifications".
the Duplex reticle (Fig. 3-5), the Fine Crosshair w/Dot reticle (Fig. 3-6), or the Mildot reticle (MILstandard) (Fig. 3-7). Be sure
your eye is positioned with proper alignment and with proper eye relief, otherwise the view will "black out. "
To change powers, rotate the power selector ring until the desired magnification appears adjacent to the power index dot.
BDC reticle Duplex reticle
En
Fig. 3-4 Fig. 3-5
Fine Crosshair with Dot reticle Mildot reticle (MIL standard)
Fig. 3-6 Fig. 3-7
13