Had a frustrating day yesterday trying to get a good image of a similar flower using stacking. Gave up, replaced the close-up rig with the 70-200mm and shot this at 175mm, 1/60s, f/16, ISO 1000, camera on tripod, bounce flash, LED light panel background.
Unfortunately the similar flower was a variety of Campanula from the garden and the plant was close enough to being past its best to mean it is not possible to try again.