采用五棱镜取景模式的传统的D S L R产品在使用的方便性和便捷性上已经日益突显出其局限性,在一些需要低角度或前面有障碍物的情况下,摄影师只能为相机加装直角取景器或完全凭经验来进行构图与取景,使用起来很不方便。另外,对于经常外拍且频繁更换镜头的摄影师来说,如何有效地 Traditional DSLR products that use the pentaprism view mode have increasingly highlighted their limitations in terms of ease of use and ease of use. In some cases where there is a need for low angle or obstructions in front, the photographer can only add right angles to the camera Viewfinder or completely by experience to composition and framing, very inconvenient to use. In addition, for frequently out-shoot and frequently changing the lens of the photographer, how effectively