#1-Athena OPT-TMP50 macro port for use on any Olympus DSLR housing, Olympus, SeaTool or Nexus, has the 67mm threads for C/U lens mount. with Athena mounting ring for strobes, focus lights and more.
This port also works for the Olympus 50mm macro lens in the Olympus Housing for E-M5 with the Olympus port adapter. $275.00 shipped in the US.
#2-Olympus PPZR-E04 focus gear for the Olympus 35 & 50 macro lenses, $35.00 shipped in the US.
#3-Olympus PPZR-E02 zoom gear for the Olympus 11-22 and 14-54 zoom lenses, $35.00 shipped in the US.
#4-Athena FG/TC14-PTE02 focus gear for the Olympus 35 & 50 macro lenses while using the Olympus 1.4X tele converter, $45.00 shipped in the US.