Topcon DL-103 Series, Instruction Manual

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3
Adjust to be focusing
Manual focusing
Turn the focusing knob to fit to the staff line in manual focusing.
Auto focusing
Pressing measuring key after power ON, telescope will be focus to
the staff line automatically.
4
Finally, use the horizontal tangent screw for precise alignment of the
target.
Note
Once the level has been focused and aligned on the target, shift the eye
to the left and right while looking through the telescope eyepiece. There
should be no deviation between the reticle cross-hairs and the target. If
there is deviation, parallax, then either focus the instrument or adjust
eyepiece.
Effective range of Auto focusing
Effective of Auto focusing range can be on the vertical line of cross hair
in the telescope. Set the required target on the vertical line of cross hair.
Auto focusing using other than Pattern Staff
In case the target to be focused shows extremely small contrast
between light and shade, focusing accuracy can be poor so it is better
that you select high contrast as a target.
Target
Sight
Focusing knob
Measuring key
Eyepiece ring
Power key
1)You will find small gap in focusing image during Auto focusing in rare
case, this is no problem in measuring accuracy.
2)Accurate focusing in manual focusing will help to be shorter for
suring time. mea