You asked

Is the panasonic lumix s pro 16 35mm f 4 good on aps c?

Here is what the site says about that.

From Panasonic Lumix S Pro 16-35mm f/4: Panasonic Lumix S Pro 16-35mm f/4: A zoom lens by Panasonic for Full frame cameras, 16-35mm f/4. Specs - Maker: Panasonic - Focal length: 16-35mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 16-35mm. - On APS-C (L-Mount): like 24-52mm on full frame; f/4 gives about the depth of field of f/6 there. ...

From Landscape: Lenses: - A wide zoom, around 16-35mm on full frame or 10-24mm on APS-C, is the classic landscape lens: big skies, strong foregrounds. - A standard zoom, 24-70mm or similar, covers most scenes. - A telephoto zoom, 70-200mm or longer, is underrated: it picks out layers of hills, a lone tree, or light on a distant ridge. You don't need fast apertures for landscapes, since you'll usually shoot between f/8 and ...

Quoted from this site's pages.

From these pages