You asked
Voigtl nder nokton 58mm f 1 4 sl iis vs zeiss otus 55mm f 1 4?
Both are manual-focus, unstabilised full-frame primes at f/1.4, so your mount and the view you want will decide it.
The Voigtländer Nokton 58mm f/1.4 SL IIs is Nikon F only. At 58mm it's a touch tighter than standard, and on APS-C it frames like 87mm, which suits portraits.
The Zeiss Otus 55mm f/1.4 comes in both Canon EF and Nikon F. Its 55mm sits closer to a natural standard view, and on Canon APS-C it frames like 88mm.
If you shoot Canon, the Otus is your only choice here. If you shoot Nikon, pick by framing: 55mm for a slightly wider view, 58mm for a little more reach. Before you buy for portraits, read how aperture and background blur work, since f/1.4 leaves very little depth of field.
Written by Claude from this site's pages.