*IMPORTANT*: when using Aquatica or Hugyfot ports with Isotta extension rings
please pay attention when using a sheye lens (with a eld of view of 180°) as there
might be a slight vignetting.
With Sea & Sea, Subal and Seacam ports with Isotta extension rings this does not
happen as the extension to the port is at the same distance.
ZOOM or
FOCUS GEAR
(optional)
PORT
17