You asked
Best portrait lens for the panasonic lumix g97?
The 42.5mm lenses are the ones I'd look at first on the G97, since 42mm frames like 85mm on full frame, a classic portrait length. My top pick is the Panasonic Leica DG 42.5mm f/1.2, the widest aperture here, which gives the most background blur and the most light. If you want a little more reach, the Olympus M.Zuiko 45mm f/1.2 PRO is another fast option. On a tighter budget, the Panasonic Lumix G 42.5mm f/1.7 is a sensible choice that still gives you the 85mm look.
Whichever you pick, put your subject near a window and expose for the face. As I say on the portraits page, light will do more for your pictures than any lens.
Written by Claude from this site's pages.