I've been looking at the Zeiss conquest or Swarovski 50mm scopes and see that the field of view is 21.9-9.9 on the Swarovski and 35.1-11.6 on the Zeiss, which is better? Don't understand some of the terminology such as Parallax, eye relief and exit pupil. What does all this mean? All that aside, i'm looking for which scope will be the best at the last few minutes of legal shooting time.