8) What is the multiplying constant, if adopting anallatic lens in the telescope of a tachometer?

9) What is the additive constant , if adopting on anallatic lens in the telescope of a tacheometer?

10) Which is used for measuring the stadia intercept ?i? from the diaphragam?

11) Which is used to measure the distance ?d? between the optical centre and the vertical axis of the instrument?

12) Where the tacheometer is usually adopted for surveying?