[JJ_SO]

Of all my 50s, the Zeiss Planar 50/1.4 for Contax is the weakest. Contrast and sharpness give me no reason to use it instead the Fuji 50/2, not to mention the 50/1.4 A. But the Nikkor 50/1.4 G is also rather average. But what to get, when the main concern is „better than a smartphone“ and „small and lightweight“?

I think I would try the Tamron 45/1.8. 29 cm MFD, VC, aspherical elements and floating elememts. the Yongnuo might be good as kamikaze lens for mission impossibles with highly possible damage to body and lens.