Zeiss Biogon T* 2/35 ZM Lens

Product Type

 Lens

Product images (click to enlarge):

Specifications

Brand

Zeiss

Model

Biogon T* 2/35

Purchase type

One time

Mount	Leica M
Sub-type mount	-
...for sensor / crop	Full frame 1.00x
Focals
Nominal focal range	35 mm.
Equiv. focals (35mm)	35 mm.
Zoom Ratio	1x
Powered zoom	No
Zoom extends	No / n.a.
Aperture
Max aperture	f/2
Aperture blades	10
Aperture ring	Yes
Clickless aperture	No
Customizable ring	No
Focus
Autofocus	No
Internal focus	Yes
Focus drive	Direct
Focus distance info	Yes
Min focus distance	70 cm.
Max magnif. (opt.)	0.06x
Max magnif. (eff.)	0.06x (35mm. equiv)
Build
Stabilization	No
N° of lenses/groups	9/6
Anomalous/Abnormal Partial Dispersion	1
Front filter	43 mm.
Weather sealing	No
Electric contacts	No

OpticalLimits 7/10
On a Sony NEX with adapter - It produced impressive quality figures in our lab. The resolution is good+ to very good at f/2 and reaches very good to excellent results 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 f2.