Laowa 100mm f/2.8 2X Ultra-Macro APO: Aperture differs for different mounts?

[Walter Schulz]

Just curious ...
https://www.venuslens.net/product/laowa-100mm-f-2-8-2x-macro-apo/
This lens is available for Canon, Nikon and Sony FE. What puzzles me profoundly:

Aperture Blades    9 (Canon), 7 (Nikon), 13 (Sony FE)

Never heard of aperture blades depending on lens mount before! Any insight would be appreciated!

[koenkooi]

From what I've understood: The canon version has electrical aperture control from the body, the nikon version mechanical control from the body and the sony version only has aperture control on the lens.

[Walter Schulz]

Thanks, wasn't aware of the different options for aperture control!