Already on M42-times I was impressed by the possibilities of macro photography with extension tubes. With my D80 works well well, where I (or earlier) have never used all 3 rings together (so I can not comment as to whether then changed the axis).
The gradations of the rings are just right, shutter speed and aperture can be retrieved automatically and the focus I'm doing anyway manually.
I am satisfied with the purchase and can the product.
