Deepsky photos, mostly taken through different telescopes and using different cameras like the Moravian Instruments monochrome CCD camera and filter wheel or even the unmodified Canon EOS DSLR camera. All those images were taken between 2012 and 2014, so quite some time ago. Unfortunately my current location (and also free time...) does not allow for deepsky photography.
Wide-angle starfield and constellations, taken with an unmodified Canon DSLR camera and a tripod only.
Atmospheric effects and halos. Sometimes you are lucky to see beautiful atmospheric effects like halos, green or blue flashes or other fantastic miracles.