lysander

These two videos might help you: PART 1 (revamped) HOW to quickly be an expert at Inspecting Used Lenses https://youtu.be/BuULcrNU43M PART 2 (AF & modern lenses) HOW to be an expert at Inspecting Used Lenses https://youtu.be/3ewcWRqsI4U

I just got mine, a minty used copy from a dealer for $960 in the original packaging. Looks like new. I have used only primes with the X-T1 until now, but have wanted a top tier general purpose zoom to avoid lugging a bunch of lenses around. Fast focus, very sharp, as a good as a prime for me. BUT, a bit heavy at first, then you don't notice. Much lighter than the equivalent Nikon gear I sold ;-)

I see no mention of the fantastic XF F/2.8 16-55mm. Just picked up a copy and find it a most useful general purpose zoom. It covers your entire range with one piece of glass. I have the 23mm, which I love, but for convenience, as will be needed when shooting your family, the 16-55 is an excellent choice.