Is Nikon Z7 and Sigma EX 500mm f/4,5 HSM APO DG compatible?

Below you will find your chosen camera and lens. Click on the product name for more information.

Buy	Nikon Z7 Released: 2018 Type: Mirrorless Sensor: FX (Full frame) 46 Megapixels 8256 x 5504 pixels
Buy	Sigma EX 500mm f/4,5 HSM APO DG Released: 2005 Telephoto Lens (prime) Focal Length: 500 mm Aperture: f/4,5

Can you combine these two?

This is the short answer:

No! This combination is not compatible

The camera and lens you have chosen cannot be combined. Here is a longer answer:

Not a lens for the Nikon Z-system

This camera and this lens is not compatible. For this camera, you can only use lenses that are constructed to work with the Nikon Z-system. If you are using the Nikon Lens Mount Adapter FTZ you can also use other and older Nikon lenses.