$N
!l-lu= F-tanθ畸变最大显示89度,刚查了手册 V/p+Xv(Zt 原文如下: .|$:%"O&X Note that this reference is meaningless for optical ,, 8hU7P systems that use field angles at or greater than 90 degrees. If a system with field angles over 89 degrees is }PC_qQF analyzed with this feature, the maximum computed field angle will be limited to 89 degrees