Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_39 ( sensor_resolution VARCHAR, cpu_usage VARCHAR, camera VARCHAR )

### Question ###
What was the sensor resolution with a minimal CPU usage for a naturalpoint trackir 3 pro?

### Accurate SQL ###

SELECT sensor_resolution FROM table_name_39 WHERE cpu_usage = "minimal" AND camera = "naturalpoint trackir 3 pro"