Technical Data

Visual autocollimators (TA60, VA900 and TA51) and digital autocollimators (Ultra and Ultra HP).

Type	TA60	VA900	TA51	Ultra High	Ultra
Accuracy:	6 sec	1 sec	0.5 sec	0.1 sec (over entire range)	0.2 sec (over entire range)
Range of measurement:	60x60 min	±900 sec	10 min	300 sec	1800 sec
Direct reading:	60 sec	0.5 sec	0.2 sec	0.001 sec	0.001 sec