Discover How to Affect the Images Received by the Eye
Students can observe a well-lit object through the viewer and then adjust the slidable scale to observe the effects on their perception of the image. You can also use the viewer to investigate the effect of various lenses that you supply. Students will be able to observe how image clarity, size, and position are affected by pinhole size, lens focal length, and lens magnification. It is made of cardboard with instructions printed right on the viewer. Size: 12 1/2"L x 4"W x 1 1/2"D.