Technology plays a key role in ethnographic sessions, enabling on the one hand a deeper analysis (you can re-examine recorded gestures, places, quotes), on the other hand a more effective way of making a final presentation (via a video report)
For my ethnographic interviews or observations, I personally choose the best technological device in order to get the right outcomes: from hidden and “spy” cameras to the GoPro, from the reflex to the professional camcorder
Thanks to my wide experience, I can manage the qualitative interview while recording via any device (audio or video): sometimes I voluntarily leave the camera out in order to let the respondent feel free to speak (but my wide-angle lens is recording!), sometimes technology comes first, playing a key role