I'm looking for opinions on 50 versus 56 mm objective lenses. I shoot all 40 mm objectives now and have no issues. What are the biggest differences between 50 and a 56 mm Objective. It just seems to me that it's a 56 mm is that much better than a 50 mm then we should've skipped the 56 and went right to a 60. Any input you guys have is appreciated.