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zebra:(1) PTB: 3rd order Petzval blur rE5q BEh 只有場曲時,在成像面形成圓斑之尺寸,應該是半徑。 G@+AB*Eu 但場曲有正負,此值也可以是正或負。(2) PTZ: Petzval surface curvature M?3#XQDvD ....... (2012-05-12 00:45) AfqthI$*m
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