Playing with Macro using 100mm macro lens. The scenario is that I want to focus stack some shots of say a very small flower. I want the flash to provide the total lighting so the camera is set so that the exposure without the flash is black. I have been increasing the ISO to see well enough to manually focus in live view, then move the ISO back down and take a shot. Then do it all again only focusing on deeper into the flower, etc. It is tedious and I'm not getting the results I'm looking for using the manual focus in live view. Short of rails etc. does anyone have any tricks or suggestions? Maybe figuring out how much to turn the focus ring for each increment and marking with tape or something. TIA As a side note, part of my problem may be that I lost a contact and the replacement I am using until I can get into an eye doc is scratched and not the correct prescription.