The previous two shots, I showed two Rainbow Shield Bug (Calidea dregii) nymphs. They were the same size. In this picture there are 3 smaller nymphs of various stages, but much earlier stages than the previous two pictures. Since I was experimenting with the 50mm and extension tube, this one wasn't taken at best lens opening. I believe you can still see that these three are really small. The big one is 2 to 3 mm. The cable they are on, is about 1cm thick.
By the way, stepping up the ISO sufficiently to increase speed, enough to apply narrow f-stops, is looking for over-exposure in the midday African sun.