tribal-warrior
Member
Just curious about something in relation to the size of the image circle of a lens. If you reversed the orientation of a lens so that light passed through from the opposite direction, would the size of the image circle remain the same or would it be different? For example, under normal use, a slide projector lens collects light from behind and projects the light through the front element. However, if you reversed the lens so that lights enters through the front element and passes out of the rear element and maintained the same distance from the screen, would the image circle size be the same?
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