The HMD client device consists of a plastic case, based on the design of Google Cardboard, which holds a mobile device, a Samsung Note 4, with screen width 5.7 in. and resolution of 1440 × 2560 pixels, that provides a perfect screen for viewing the image captured from the camera and the virtual objects. When this solution was used, we noticed that the lens of the mobile was too zoomed-in that caused problems with estimating distances, and caused some discomfort. The factor of the zooming was changed by a small mobile wide lens adaptor, in front of the mobile device's camera, that reduced the discomfort.