Taking photos of slime mould is not a simple process, although technology has made it much easier in recent years.
Barry explains that due to the size of the subject, “one picture would not do them justice, you can get virtually nothing in focus”.
He describes how he uses a technique called focus bracketing, where dozens of photos are taken.
“You take multiple pictures, sometimes over 100 and it takes tiny little slithers of focus, and then you put all those into software, and that creates your final image.”
Years ago Barry would have to adjust the focus for each of those 100 photos, but now it does it for him.
“It’s all clever stuff,” he tells me.