DZJ2 add two laser diode bases on optical plummet,it could offer upward laser and downward laser along same plumb line.The design ensures laser beam and telescope axis on same center,same axis and same focus.Otherwise,theese is a laser target sheet as standard accessories;it is more convenient for measurement. It is used widely in construction, industry installing, engineering inspecting and distortion observation as well as many others engineering survey .

Use high precise theodolite axis system

Easy centering with laser plummet

Compact design and stable structure