Pentax R-315EX(NX) - Manual (Page 27)

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Vertical line (single)
Horizontal line
Sight axis
Vertical lines (double)
3.6 Eyepiece adjustment
[Eyepiece adjustment]
The eyepiece adjustment is performed before
target sighting.
Remove the telescope lens cap.
Point the telescope at a bright object, and rotate
the eyepiece ring full counter-clockwise.
Look through the eyepiece, and rotate the
eyepiece ring clockwise until the reticle
appears as its maximum sharpness.
• When looking into the eyepiece, avoid an intense
look to prevent parallax and eye fatigue.
• When it is hard to see the reticle due to poor brightness,
press [ILLU] to illuminate it .
For adjusting intensity of brightness, refer to "4-4 Adjusting Reticle Illumination”.
3.7 Target sighting
[Auto focus]
The Auto focus mechanism is very precise but will not function under every
condition. There is a slight possibility of focusing failure owing to brightness,
contrast, the shape and size of the target.
In such a case, press the AF button and focus on the target by operating the
Power focus key or the AF ring.
No contrast like a white wall Bright back light
Obstacle in front of a target A wall composed of
single horizontal lines
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