Place the lens of shortest focal length near the end of the

Last updated: 3/21/2023

Place the lens of shortest focal length near the end of the bar marked 0 Now place one of the long focal length lenses at the other end of the bar With the eye near the small lens or eyepiece look through the lens combination at a distant object Move the eyepiece lens back and forth until a clear sharp image which fills the entire field of view is seen During the adjustment the eye should be kept close to the eyepiece lens 1 Is the observed image erect or inverted 2 Which lens objective or eyepiece is responsible for this condition of the image 3 Record the distance between the lenses How does this distance relate to the sum of the focal lengths of eyepiece lens and objective lens