Sigma t mount 500mm mirror lens fixed aperture at 1:8. In case no caps . No fungus but mirror looks like it could do with a light wipe in places . No idea on the workings of this so sold as spares or repairs , it’s probably fine but just to cover my back . In my opinion it looks remarkably clean for its age though some new grease and some tender care would t go a miss . T mount adapters are availible really cheaply on eBay for most cameras.
