Lens performance should be evaluated with various aspects: image shapness, color reproduction, uniformity of illuminance, lens size, lens appearance, lens cost, and so on; because, a lens can be a good one for its user only when all of these aspects are well performed and balanced.
Especially, imaging performance should be presented to the lens user in a simple and plain way, but still complete enough for proper decision. Such a representation form will be proposed in this paper.
