I had the opportunity to join a group of photographers for a special shoot. We arranged to enter the show before it was open to the public, and we were permitted to use tripods.

The group gave pointers before the event to use a middle f-stop (f5.6 or f8)  to ensure you get the entire orchid in focus, and make sure you have a soft or black background. Use of the tripod and remote trigger was essential to eliminate any camera shake and get the sharpest possible images.