. The number in question Q28 is the telescope calibration scale. This scale is a size-to-distance ratio. The scale tells you the size of the object in millimeters that fills the whole field of view at a distance of one meter. This scale can be used to determine an object's size when the distance is known or to determine the distance to the object when the size is known. 19. Application: Set up your telescope to focus on a large object on the opposite side of the lab. Carefully observe the portion of the object that fills the entire field-of-view of the telescope. Q29) Describe and draw the object you've chosen on an observing Log Sheet Q30) ately measure the distance from the objective lens to the object in meters (m). Record and label this value Q31) Using the telescope calibration scale (Q28) the width of the object you observed to fill the field of view. Show your work, including units (should be millimeters) Q32) Measure and the actual width of the portion of the object you observed. record