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My very first photo taken using a new 400mm 'reflex' lens. Reflex lenses use mirrors instead of normal glass lenses. They are relatively small and lightweight and are quite affordable.

Data: Handheld Nikon Z6 full frame, uncropped; 1/1600 sec, f/8, ISO 6400. Subject distance is about 35 ft.

Note the characteristic donut bokeh. Note also the ironic reversal: The lens uses mirrors while the camera itself is mirrorless; this is a 'glassless' photo (and therefore completely free from refractive aberrations).

The dark edges seen left and right are not vignetting, but rather, out-of-focus foreground objects.