OK, I realise with summer coming, it will be hard to get away from heat shimmer or mirage effects when zooming in on long shot on hot days, but I was wondering if there were any tips on how to reduce the scintillations? Would any filters make heat shimmer less obvious? Conversely, if we wanted to increase the heat shimmer (mirage) effect on a day when there is not much mirage around even when zoomed a fair bit, are there any certain filters which would make the heat shimmer more visible?