Do you happen to know if a Televue Dioptrix can be fitted to this eyepiece. I have read somewhere that a dioptrix can be fitted on one of Hyperion Zoom models, but I cannot remember which one .
George, you may wish to see my earlier IIS post about fitting the TV Dioptrx to Hyperion EP's here . I'm not sure about the Hyperion zoom but the eyecup really shouldn't be any different to the prime EP's, perhaps Mike could let you know.