A friend found a firmware¬†enhancement¬†for some of the Canon DSLR cameras including the 5D MK II that I use. Two of the features in it are HDR and stacking. There is the ability to combine both of them and the camera will shoot the frames needed. This old light meter is a combination of 24 images. There are four frames for each of the six slices that make up the HDR and stacking. I’m just learning the software and it’s quirks but it looks like one heck of a tool.

Old  GE Light Meter

Old GE Light Meter