Carl Zeiss Biogon T* 2/35 ZM Pro Reviews

The Biogon produced impressive quality figures in our lab. The resolution is good+ to very good at f/2 and reaches very good to excellent result beyond till diffraction is limiting the quality from f/11 onwards. Lateral CAs are well controlled and not overly field relevant. The bokeh fringing (LoCAs) is typical for such a fast lens. Distortions are basically absent. The most obvious weakness of the lens is the amount of light fall-off at f/2 which is quite a bit higher than average for a full format lens. The build quality of the Zeiss lens is superb thanks to an all-metal body and super-smooth controls. Even so the pricing is on the steep side at around 900EUR. This may still be rather affordable within the Leica M scope but it's probably over the edge for an adapter solution on a Sony NEX camera.