Interesting findings. Why would Nauticam recommend a 2mm shorter extension (67-65) for the longer Leica lens with the same 180mm (7) glass dome port? Does this make since?
Sell more parts? Don’t really know 2mm are unlikely to make a substantial difference. Ergonomics maybe? How does it work for you?
On paper considering the port is the same it doesn’t matter.
Likewise for the 6” wide angle port it works anyway and is more compact than the 7”. Will you see a difference between them with the 12-60mm? I don’t think so. 12mm is not that wide and Nauticam is happy to recommend 3.5” wide angle ports with extensions for other olympus 12mm lens. Port size has to do with focus distance and all those lenses focus pretty close so don’t need large domes
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