`D`sr[3n F-tanθ畸变最大显示89度,刚查了手册 \"CZI<=TB 原文如下: ?_"+^R z Note that this reference is meaningless for optical bx]N>k J systems that use field angles at or greater than 90 degrees. If a system with field angles over 89 degrees is S:TgFt0 analyzed with this feature, the maximum computed field angle will be limited to 89 degrees