Some years ago when Jupiter was at opposition and the seeing was near perfect I got stunning views through a 14.5 inch F 7 dob using a 13.8mm Meade Wide field eyepiece. My club members were lining up for the view of cloud bands so pronounced that they looked brown. Yet on putting in a 13 mm Nagler the view was pale and washed out by comparison, and at the time I thought that the extra glass in the Nagler was to blame.