Centon's mirror lens with Minolta AF T2 adapter — the budget 500mm f/8 for A-mount.
The Centon 500mm f/8 Mirror with T2 Mount listed as Minolta AF compatible is a catadioptric (mirror) telephoto in T2 screw mount, adapted for Minolta AF-mount cameras via a T2-to-Minolta AF adapter. The designation 'Minolta AF' indicates it is set up for Minolta Alpha AF cameras, though the mirror lens itself has no autofocus capability.
The lens uses a catadioptric mirror design providing 500mm at fixed f/8 aperture — no aperture ring. The T2 mount connects to the camera via a T2-to-Minolta AF adapter. Manual focus only.
Despite the 'Minolta AF' designation, this is a manual-focus mirror lens that simply uses an adapter plate matching the Minolta A-mount. The donut bokeh characteristic of catadioptric designs is present. The T2 mount is a universal thread that adapts to many camera systems via different T2 rings.
Test manual focus operation. Verify T2-to-Minolta adapter coupling. Check front and rear mirrors for coating condition. The donut bokeh is inherent to the mirror design. For use on Sony A-mount digital cameras, confirm adapter functionality.