My extension tubes came in, a while back, for the Salut-S.

Two tubes, a 19mm and 48mm. The stiff plunger rod in the 19mm extension that makes this automatic is now freed up completely thanks to some penetraing oil. I love how the former Soviet Union gear came in these nice plastic containers.

The tubes can be used singly or combined for maximum macro work.

It also came with some handy instructions. Anyone read Russian? Apparently it was made in 1983. And it was probably never used.

It would appear that I need 4 times the exposure with both extension tubes. Or am I missing something?