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Nikon z 40mm f 2 vs voigtl nder septon 40mm f 2 aspherical?

Both are 40mm f/2 primes for full frame, and neither has stabilisation. The big difference is focusing. The Nikon Z 40mm f/2 has autofocus, and I call it small, cheap and good, Nikon's everyday prime. If you shoot a Nikon Z body, it's the easy pick.

The Voigtländer Septon 40mm f/2 Aspherical is manual focus only. It's the one to consider if you want to focus by hand or you shoot Sony E as well as Nikon Z, since it fits both mounts.

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