Furnari
Contributor
Based on my experience with the dedicated Olympus OMD macro port and an AOI port, if what you have fits the 60mm, the 30 will also fit. Yes, you will be outside of the minimum focus distance, but it's workable. That's the cheapskate route- I recently bought a dedicated AOI port for the 30mm that I can use with the 60mm by adding an extension ring; I haven't dove with it yet but I figured it made more sense in the long run to just spend the money. You've heard the saying "buy once, cry once"? For UW photography it's more like buy six times, cry half a dozen times.