Elphel office is designed with the calibration room being it’s most important space, expandable when needed to the size of the whole office with the use of wide garage door. Back wall in the new calibration room is covered with the large, 7m x 3m pattern, illuminated with bright fluorescent lights. The length of the room allows to position the calibration machine 7.5 meters away from the pattern. The long space and large pattern will allow to calibrate Eyesis4π positioned far enough from the pattern to be withing depth of field of its lenses focused for infinity, while still keeping wide angular size, preferred for accuracy of measurements.