My first official reflected UV photo had of course to be a dandelion that showed up just in time for the test.
ZWO ASI678MC camera with ZWB1+QB39 filters, 50mm f/2.8 Cassarit @ f/5.6, 517.5ms exposure, Gain 200 (approximately corresponding to ISO400), planetary surface stacking technique on 25% of 32 frames.
Not bad for a 60-70 year old lens on this tiny sensor!