I've made some HDR pictures before with a digital camera and photoshop (don't shoot me), but I think this can also be done with analogue camera's. My guess is that I use double exposure and divide the shutter time. For instance, let's say a single shot would have to have a 1/60 shutter time. I would divide this into 1/20 and 1/40. Making it a total exposure time of 1/60. Is that right or doesn't it work that way?