I'm getting repeated questions from customers about the parfocality performance of my two new Zeiss 880 Airyscan systems, one on an Axio Observer (inverted) and the other on an Axio Imager (upright). Do you think a 70 micron spread between lenses is reasonable, or are you operating much tighter? We mostly use dry and water lenses. Does anyone have the new Zeiss 40x/1.4NA plan Apo and is it any good for Airyscanning. It should be super-bright. Also, what do you charge for rental if yours is in a core facility, and is that institution subsidized?