I have two eyepieces for my Fieldscope ED78. I am wondering whether any one has experience of whether they will fit later models, specifically the ED82 and the new Monarch 82ED? Nikon still list a zoom eyepiece (13-30x/20-45x/25-56x MC Zoom) which looks similar if not identical to the zoom eyepiece for the ED78, the only difference being I can find no reference to 'MC' with my eyepiece. For the one they list they say it fits Fieldscopes III, EDIII, ED82 and ED50 - but don't refer to ED78 or Monarch 82ED.