what adjustment is used to find and focus of the specimen
5. Looking through the right eyepiece with your right eye, turn the coarse adjustment knob to bring the specimen into focus. When you have optimized the focus with the coarse adjustment controls, use the fine adjustment knob to improve the focus. 6. Looking through the left eyepiece with you left eye, turn the diopter adjustment ring to focus the specimen. 7. Adjust the interpupillary distance between the eyepieces.