At the cost of less light, the image can be made sharper by reducing the aperture The camera obscura can form images of objects across an extremely wide angular field due to great depth of focus and o...At the cost of less light, the image can be made sharper by reducing the aperture The camera obscura can form images of objects across an extremely wide angular field due to great depth of focus and over a large range of distances (great depth of field) as you can see in the right picture of Figure \PageIndex1. If a film would be used to record the image, very long exposure times are however needed because only a small amount of light enters the pinhole, (f-number=500).
