Christmas cactus is what I call it when I don't have Wikipedia at hand. Started blooming like crazy as the weather cooled.
A stack of about 125 images, composited in Zerene.
D800E 200mm 1/250 f6.3 iso 100
Tripod, tethering software Helicon remote to automagically take the 125 images through focus. Remote flashes in front to left and behind.
Thanks, Diane. I agree on the extra space, and have a version as you suggest.
I have stacked 250 frames, of a 1:1 true macro. I did that one in two batches of 125 because I was concerned about a lack of room on the disk crashing the stacking software. The two stacks were then merged in Zerene.