Hello I am hoping to take some pics of my friend's ancient camper van this weekend weather permitting, and I would like to try HDR on my D5100. To do this I know I will have 3 images taken on my camera by the HDR setting. Do i have to be in manual or can I stay in aperture? Also when I tried it before I could only see 1 image in the playback menu. Is this correct?. I just want to try things out at home before going obviously and Any advice would be greatly appreciated. Thank you in advance