I'll do my depth of field testing today at 5.6. Read good things about the Sigma lens. I'm all about weight. Not because of flying time. Usually I'm only in the air for 10 minutes. I just want the Solo to behave properly. Shooting Raw + JPEG. I am impressed with the limited amount of time my screen goes dark with this camera on time lapse. A Gopro takes a picture and it is at least a second compared to maybe 1/4 second with the 5100.