You asked
Can I use adapted lenses on the nikon d810?
Here is what the site says about that.
From Nikon D810: Nikon D810: A DSLR by Nikon with a 36.3-megapixel full frame sensor, announced in 2014. Still a strong used body for landscape work. Specs - Maker: Nikon - Mount: Nikon F - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 36.3 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2014 - Type: DSLR Focal lengths on it Full frame is the ...
From Landscape: Landscape: Landscape photography is slow. The light does the work, the scene doesn't move much, and you can use a tripod. That changes what matters in a camera.
Quoted from this site's pages.