I forgot to formally post these earlier.
This is the Hasselblad 8mm Extension tube.
In my view, it addresses one of the major shortcomings of the Hasselblad 500 series: The close focus distance. Had I had one of these earlier, I probably would not have bought and sold so many different Hasselblad (and MF…) cameras.
(Okay fine…and bought and sold and bought and sold and…you get it).
I previously tried the 16mm tube, but it brought the focal range down to basic macro, and was not terribly useful. The 8mm extension brings the 80mm lens down to useful “household” distance. DOF is exceedingly thin, so focus is a little bit more deliberate; also moving targets are a tad challenging. Portraits at close-focus show some very minor perspective distortion…but kids don’t really care about that. 😉
These are all on HP5+ pushed to 1600 ISO.