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zebra:(1) PTB: 3rd order Petzval blur /)v+|%U 只有場曲時,在成像面形成圓斑之尺寸,應該是半徑。 +EA ")T<l 但場曲有正負,此值也可以是正或負。(2) PTZ: Petzval surface curvature ;R&W#Q7>3 .......(2012-05-12 00:45)嬀/color] &b~X&{3,
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