Nikon z 800mm f 6 3 vr s vs ttartisan 500mm f 6 3?

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From Nikon Z 800mm f/6.3 VR S: Nikon Z 800mm f/6.3 VR S: A prime lens by Nikon for Full frame cameras, 800mm f/6.3. A Phase Fresnel element keeps this 800mm light enough to hand-hold. Specs - Maker: Nikon - Focal length: 800mm (prime) - Maximum aperture: f/6.3 - Made for: Full frame sensors - Mounts: Nikon Z - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Nikon Z): as marked, 800mm. - On APS-C (Nikon Z): like ...

From TTArtisan 500mm f/6.3: TTArtisan 500mm f/6.3: A prime lens by TTArtisan for Full frame cameras, 500mm f/6.3. Specs - Maker: TTArtisan - Focal length: 500mm (prime) - Maximum aperture: f/6.3 - Made for: Full frame sensors - Mounts: Sony E, Fujifilm X, Nikon Z, Canon RF, L-Mount, Canon EF, Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, Canon RF, L-Mount, Canon EF, ...

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