You asked

Best camera for the voigtl nder septon 40mm f 2 aspherical?

The Septon is a manual-focus 40mm f/2 made for full frame, so I'd start with a full-frame body and let it show its natural 40mm view. My picks:

If you're not sure which mount to buy into, read how to choose, in three questions first. It's worth thinking about which lenses you'll want in a couple of years.

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