The One Lens I’d Want First for the Leica SL3
The 60MP sensor of the Leica SL3 even shorn of the MULTISHOT mode of Leica SL2 still needs top performance for full resolution captures.
What is going on with Leica lens design?
Were I to pick just one lens as the best all-arounder, it would be the Leica 35mm f/2 APO-Summicron-SL ASPH. With outstanding performance, near-nil distortion, and minimal focus shift, none of its siblings can quite compete with its combination of goodness and highly useful focal length.
I’d also be keen on the Leica 21mm /2 Super-APO-Summicron-SL ASPH though it might be worth trying the Leica 14-24mm f/2.8 Super-Vario-Elmarit-SL ASPH just for the range and flexibility.
If your budget is not blown from that, then explain to The Wife about how nice the lenses are, get her a Leica Q3, and things should work out OK from there.