I\'m trying to get digital zoomed frame on Android 5.0 with camera2 interface. Appropriate doc for that functionality is developer.android.com/camera2/captureRequest
Fixed! General idea is to calculate crop region for preview and still images separately.
1) Calculate crop region for still image as in initial post (use 4:3 rectangle)
2) For preview take above crop region (4:3) and reduce vertical size to get 16:9 rectangle.