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Is the leica summilux m 50mm f 1 4 asph good for portraits?

Yes, it's a good portrait lens. The 50mm f/1.4 ASPH is fast enough for soft backgrounds and low light, and on a full frame Leica M it gives a natural view. The portraits guide describes 50mm as a slightly tight, natural view on full frame, so it suits head-and-shoulders work well. For tighter headshots you'll want something longer.

If you want to show more of where someone is, the Leica Summilux-M 35mm f/1.4 ASPH is the better choice for environmental portraits and small groups. It also fits Leica M bodies such as the Leica M11 and the Leica M10.

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