A.24~28mm B.20~24mm C.24~30mm D.23~30mm
A.0~15°; B.0~25°; C.0~35°; D.0~45°; E.0~50°;
A.阿貝數(shù)越高,色散越大,鏡片成像越清晰 B.阿貝數(shù)越低,色散越大,鏡片成像越清晰 C.阿貝數(shù)越高,色散越小,鏡片成像越清晰 D.阿貝數(shù)越低,色散越小,鏡片成像越清晰