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现代变焦物镜的特性应保证等效地取代先前采用的各种可换物镜。由于各种可换物镜的短焦距物镜能够实现近距离拍照,所以也在变焦物镜中努力设法缩短最小调焦距离,这样就可以显著扩大其使用的可能性。
The characteristics of modern zoom objectives should be guaranteed to replace the various interchangeable objectives previously used. Due to the short focal length objectives of various interchangeable objectives, close-up photography is also possible, and efforts are also being made in zoom objectives to try to shorten the minimum focusing distance so that the possibilities of their use can be significantly increased.