From what I can tell, these cactus flowers only bloom at night and are gone by morning. These next few shots were taken using my on-camera flash and a handheld reflector.
If you think that trying to focus at 1:1 is difficult (even though this is more like 1:2), try doing it in almost complete darkness. Focal depth of slightly more than a milimeter here. Even with my focus assist beam it was tricky, but without that it would have been a lost cause.
categories: abstract flora macro nature night