Using a homemade optics bench, the focal length of a convex lens was determined. The object used was a candle flame.The candle was movable along the meter stick. The object was placed at different lengths from the lens, all factors of the focal length, and the image described as seen on the screen. The images were compared to those which were seen theoretically by sketching the ray diagrams earlier. The same procedure was performed using diverging lens. The optics used in a camera was drawn utilizing the information from the lens demonstration.