Your camcorder should have these basic features: autofocus, playback facility, zoom lens.你的便携式摄像机应该具备以下基本功能：自动聚焦、回放功能、变焦镜头。From the grain of the print, Stephanie could tell that the photographer had used a zoom lens.斯蒂芬妮从照片的颗粒粗细可以断定摄影师用了变焦镜头。The photo was taken using a zoom lens.这张照片是用变焦镜头拍摄的。