Today I experimented some more using off-camera flash. My subject was a monarch caterpillar, and the photograph was taken on a Sony A7ii, using a Nikon 105mm macro lens on a bellows, with a Yongnuo trigger and one flash set to low power, about 20cm away. The bellows let me focus very close indeed, while the flash meant I could use f/22. I’ve definitely never got as close and sharp an image of this type of beastie’s mouth parts and ocelli before. But I have also rediscovered that a high f/stop makes every teeny bit of dust on the lens waaay more visible!