The extensive range of FD accessories sure comes in handy at times, especially when there's a particularly difficult shooting situation. Once in a while you just need a lot of focal length for a macro situation, but then the minimum focusing distance is a bit too long. For relatively quiet subjects, such as dirt, I've finally come up with a solution for the problem. At 4,480mm, your working distance is so great that there's no fear of startling your subject, unless it sees the rig from the side. The Speedlites complicate setup, but are all needed since the effective aperture is something like f/20,000. The extension, nearing 500mm, reduces minimum focusing distance to a practical point. Depth of field is in the neighborhood of 1mm, so precise focusing with a C screen is essential. Unfortunately, the support required, inadequate though it is when using only the Earth as a foundation, precludes shooting living subjects. A cable release is recommended, as well as a car battery adapted to power the Speedlites. No FD gear was injured in the making of this setup. Happy April!