Originally posted by abruzzi I’d want one lens in a 3 lens kit to be at least a pseudo-macro, 1:4 at least, 1:2 ideally. Not that I shoot macro much, but I sometimes like to get close up. So I’d probably second something like the M100/4 macro.
This is why my semi-serious lens trio contained the Tamron 52B; 49mm filter thread for that commonality, an f2.5 max aperture for subject isolation and sort-of-usefulness in lower light situations, 90mm is a nice focal length for portraits, and it's a 1:2 macro without any additional hardware. It's really pretty great! Bonus for not being all that large (it's pretty heavy so I can't say it's light weight as well).
Of course then I screw up and suggest a 24mm lens with 52mm filter threads, and a zoom that is even larger, so really it may not be so useful after all.