How to use theodolite?

1, the eyepiece focuses to make the crosshair clear.

2. Aim at the target roughly, and focus the objective lens to make the target clear. Pay attention to eliminating parallax. Focus on the goal.

3. Adjust the lighting reflector to make the brightness of the reading window moderate, rotate the eyepiece of the reading microscope to make the line clear, and then read.

4. Check whether the centering mark deviates from the grounding point. If there is deviation, loosen the connecting screw on the tripod, translate the instrument base, make the centering mark accurately align with the center of the measuring station, and tighten the connecting screw.

Precautions:

It is mainly used with ground telescopes (geodesy, bird watching, etc.). ). If it is used to observe celestial bodies, the direction of motion of celestial bodies is usually not vertical or parallel to the horizon.

Therefore, it is necessary to rotate two axes at the same time and change the rotation speed with time to track the celestial body. However, other celestial bodies in the field of view will rotate relative to the target celestial body, and unless a mechanism is added to counteract the rotation of the field of view, it is not suitable for celestial photography with long exposure.