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CPL偏振镜在超广角镜头(16mm等效以下)使用时，天空会出现明暗不均的深浅斑块，广角风光慎用或需后期修正

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Unverified超广角镜头(如16mm以下)不建议使用普通厚框CPL，边缘会产生机械暗角，应选超薄框(slim)CPL或专用方形滤镜支架78% similar Unverified带CPL偏振镜功能的外置镜头能消除玻璃/水面反光并压暗天空，比普通广角/长焦更适合旅行拍风景，但会损失约1-2档进光量，弱光环境不宜使用76% similar Unverified超广角镜头（等效焦距约24mm以内）使用圆形CPL时，画面四角可能出现暗角，建议超广角用户选购超薄边框版本或确认NiSi该口径型号的镜框厚度。73% similar Unverified使用超薄黄铜边框设计，在广角端（等效24mm以内）发生暗角的概率低于普通厚框滤镜，但全画幅超广角镜头仍需注意核对焦距兼容性。71% similar UnverifiedCPL偏振镜有最佳偏振角度，仅在与太阳成90度夹角时效果最强，正对或背对太阳几乎无效，风光拍摄需边转动边观察取景器70% similar

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