The rare black rhino

I photographed these two black rhinos in northern Namibia. A researcher I'd met told me the two animals came to drink at this man-made waterhole every other night between 8pm and midnight. I waited in a blind set up specifically for photographers, and sure enough, around 10pm, they appeared. I was still shooting film with a medium format camera in 2001, and this made the exposure especially challenging because I couldn't see the results until I returned home and developed the Fujichrome Provia 100 slide film. I was about 70 feet from the rhinos, and due to the inverse square law, the light fall-off from the powerful Metz 45 CT-1 flash was significant. Therefore, based on a Sekonic hand held flash meter I was using, I had to push-process the film 3 f/stops to obtain the correct exposure. 100 ISO film pushed 3 stops is 800. At the bottom of the frame, a small rise in the ground at the edge of the water was illuminated. It was out of focus due to the limitation of depth of field and therefore distracting. I eliminated that by using the plug-in Flood. That made visual sense because the rhinos were drinking, and the expanded water surface looks natural.