During the last few weeks, I have been trying to come up with a good solution for testing lenses that did not require constant movement when dealing with slightly de-centered lenses. The idea was to build a setup similar to macro rails, but one that is bigger in size and very stable at the same time. Stability is extremely important, because even a slight vibration can negatively affect lab results. Using an Arca-Swiss quick release setup was a no-brainer, because it allows moving the setup without having to deal with mounting and dismounting anything, while being rock solid when tightly secured. While my BH-55 Pro tripod head from Really Right Stuff has been serving me well for a while now, it was hard to use for minute adjustments that are often necessary when testing lenses. Therefore, I decided to replace it with a geared head that would allow very precise vertical and horizontal tilt adjustments, along with the ability to pan, when needed. My quick search revealed that unlike the army of pan/tilt heads and ballheads, which are made by a myriad of companies, there are only a few options available for geared heads today. One of them is the Manfrotto 405 Pro Geared head, which I am reviewing today.