Well, we don't know how small are the objects that the OP is going to photograph. I certainly agree that, if they all are spherical, there is no point in rotating the focus plane. One assumes a photographer does not only take pictures of exactly spherical objects, and if they are not all exactly spherical (watches, jewels, who knows) a rotation in focal plane might give a substantial help for the final image quality (let's say aligning the focus plane with the dial - thickness of the watch). I never used a bellows with movements though, althought I've read it helps, I would be glad to be able to give an answer validated by personal experience.
IIRC there was a Kenko bellows in the eighties (for 35mm) that had movements in both standards.
See post #3
Originally Posted by BetterSense
Recently I have been trying to photograph a small round seed pod at about 1:1 with my Olympus OM1 and 50mm Macro with extension rings. I put the lens on f/22 which is probably an actual f/45 or so at 1:1. The 8x10 proofs I made aren't impressively sharp, and I think I have eliminated camera/subject motion as a cause.
The maximum size would be 1" or 24mm, Next question?
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.