Camera : easy - Df
Lens : less easy. Depends on the week. Probably a 50 (40 to 58); down to 28 still ok, up to 105 ok too.
Zeiss Milvus 50/2, Voigt 40/2 with close-up lens if I need sth lighter, or Voigt 58/1.4 would be three safe answers.
105/2.5 is less versatile (MFD a bit long) but sure to bring back good shots. Tamron 90/2.5 (52B model) would have been a more versatile alternative, I find the FL more convenient and it reaches 1:2 without extension, but contrast is a bit low and background bokeh is not as good. A pity.
Nikkor 50/2 AI : it often surprizes me (favourably), and is comfortable to use.