理论上分析转镜分幅相机分幅系统放大倍率不一致产生的原因及因素。给出分幅系统放大倍率校正的方法，并以国内普遍使用的FJZ－250型高速转镜分幅相机为例，给出了每一画幅的放大倍率和校正系数。实测结果表明：分幅系统的放大倍率的不一致性与理论计算值差异较大，以校正的数据去分析处理爆轰实验底片，其空间测试精度有较大的提高。

The reasons of the magnification inconsistency for the framing system in the highspeed rotating mirror framing camera were analyzed theoretically. The correction method of transversal magnification for the framing system was introduced. Taking model FJZ-250 rotating mirror framing camera as an example,the magnification and correcting coefficient of each frame are presented. The measurement results indicate that the magnification inconsistency of the framing system is different significantly with the theoretically calculated value. The spatial test accuracy would be improved by processing the experimental negatives with the corrected coefficient.