Hi Gerald,
i was in Berlin two weeks ago and I was surprised when I have seen come down single snow crystals perfectly visible through naked eye!
your subjects looks like jawels!
best
arturo
@macrochemistry
I took an old microscop with a no name optik outside. I don´t know if the coldness destroy the bonding of the lens. You know it was very cold in germany.
Does anyone have experience with coldness and optics?
@arturo
yes - it was crazy. -15 Grad Celsius and snow was falling. Wonderful single crystals having up to 6 mm diameter. To big for my 5x-objectiv