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zebra:(1) PTB: 3rd order Petzval blur Aen)r@Y: 只有場曲時,在成像面形成圓斑之尺寸,應該是半徑。 1=x4m=wV 但場曲有正負,此值也可以是正或負。(2) PTZ: Petzval surface curvature }v[*V ....... (2012-05-12 00:45) ~U+SK4SK:o
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