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zebra:(1) PTB: 3rd order Petzval blur Z9vJF.clO 只有場曲時,在成像面形成圓斑之尺寸,應該是半徑。 4!^flKZQ 但場曲有正負,此值也可以是正或負。(2) PTZ: Petzval surface curvature /O/pAu> .......(2012-05-12 00:45)嬀/color] >wJt# ZB
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