I use the angle of my old D70, which I use exclusively in the studio. The rail is mounted on the left hand side of the D70 leads the angle upward. The cover of the USB connector I removed so that the camera is connected during the recordings via USB to the Mac and can be triggered. The angle is unexpected for this price very accurately (to Sirui ball head) and fast Wchseln from high to landscape simply goes by equip. I facilitated the angle the work in the studio and very little for money obtained a good quality! Clear recommendation!