When I was attending a technical institute some 20 plus years ago I had a battle over a photograph. I was majoring in audio-visual technology that involved making graphs by hand, lettering, slide presentation, photography, and more. It was a two year course with four semesters of photography. It was my favorite course, but the instructor was horrible. At least to me. No matter how I tried, I couldn't please him. I got Cs in the glass which seemed out of place, since all but one semester, I got As with only one B in my other subjests. Anyway, The last semester was studio work, using a medium format camera,,,,not the good ol' 35 mm I was used to. But, there were lights! Lots and lots of lights! Lights for the front of the subject,,,side, and even back. And, there was the light table which had a thin sheet of fiberglass that ran up the back. It allowed diffused light of any color to come through to light the subject. One of the shots I set up was of two sparkling juice bottles, clear and shaped like wine bottles, and two wine glasses half full of the juice, apple and strawberry. I took the light readings,,,,focused, and took several shots with different light settings. We had to take the film to a local commercial processor since we couldn't do it in house. I took the finished shot to the teacher as proud as I could be, and he killed me saying it was out of focus.(He'd complained about my eyesight during the school years. He said he couldn't read the print on the bottles. I had taken his advice on lighting, but I knew the focus was right. Even the processor said it was. The problem? The lights were too bright,,his settings not mine. I re-shot it when he wasn't around, using my settings. The result? The focus was right. I didn't tell him the focus hadn't changed, but the lighting had. No need to start another war.