And yes, I took a deep breath, and cleaned the rear face of the objective.
6 locking screws around the objective cell perimeter, then unscrew it as usual (after I marked the original position of course). Blew it with a squeezie blower, then carefully wiped with hydrogen peroxide (6%, not usual 3%), to kill and neutralise the mold, which was not really any longer visible, but I wanted to make SURE. Polished off, and reassembled. And now the objective is that gorgeous green again.
Of course, it is now cloudy, so will be content to view distant trees for tonight
