All lens functions are transferred without difficulty. The bayonet mechanism is initially a little stiff but fully functional, because nothing wobbles. Optical properties have the aphakic Extensiontubes course not hanging at 100% on the lens used, whether it is to use outside the designed function by significantly longer routes between the last lens and chip photo yet. Lenses (shortest distance) are in the normal short range already weak, are usually no better by the intermediate rings.