What's EOF Steve?? Only thing I can say is that the chap at York Optical showed me a "cheaper" zoom eyepiece, (no idea of the brand) and it was awful - felt sloppy I thought it was going to break in half. The Baader is big, heavy and so solid. Good firm clicks between each setting
I use mine on all sorts, Joops, Moon DSO especially clusters ie Eta area. Start at 24 mm on that monster cluster, then click down to zoom in for more detail. Magic and all without having to change EP and refocus again
Sorry Steve, I guess EOF is edge of field. Well it seems really good -
I cant remember having to re-centre the edge stars into the middle. It is certainly better than my Meade 26 mm QX on the EOF.
Cheers