OK so I have a few Rolleis. I bought them used from keh.com and I believe that my Rollei's have two types of screens: ground glass focusing screens (MX-EVS, 2.8D) and fresnel focusing screens (2.8E, T). I might be a ground glass type of person but prefer focusing on my older Rollei's than on my newer ones. It seems that fresnel screens have more potential for brighter screens but I sometimes hear that they are harder to focus? Do Maxwell screens have less contrast than ground glass screens?