A.5%~10% B.10%~20% C.30%~50% D.50%~60% E.20%~30%
A.1/3MED B.1/4MED C.1/2MED D.3/4MED E.1MED
A.照度不變 B.1/6 C.1/8 D.1/4 E.1/2