The file 'Seafrogs A7iii Zoom Gear For Tamron 28-75mm 2,8 F/2.8 Di III VXD G2 3D Printer Model' is (mb,stl) file type, size is 500.0KB.
I made a working Zoom Gear for the Seafrogs A1, A7C, A7 III, A7R III, A7S III, A7 IV, A7R IV, A9, A9 II Compatible Underwater Camera Housings.
Officially not supported lens:
Tamron 28-75 mm F/2,8 Di III VXD G2 (E-mount).
probably also works for
Tamron 28-75mm F2.8 Di III RXD (E-mount)
It's a very tight fit on the zoomring, so depending on the precision of your printer you might need to adjust the size on the top two rings of vertices.
Tamron28-75.0006.mb | 1.6MB | |
ZoomRing3.stl | 158.1KB |