Compare lenses

Leica Elmar-M 24mm f/3.8 ASPH vs Zeiss Biogon T* 25mm f/2.8 ZM

The Leica Elmar-M 24mm f/3.8 ASPH and the Zeiss Biogon T* 25mm f/2.8 ZM side by side, computed from this guide's catalogue.

Which to pick

Pick the Zeiss Biogon T* 25mm f/2.8 ZM if you want a brighter f/2.8 (0.9 stops more light), for dim light and softer backgrounds. On these specs the Leica Elmar-M 24mm f/3.8 ASPH has no clear advantage: choose it if the price, the handling or a lens you own decides it.

Still torn? Ask the guide about the Leica Elmar-M 24mm f/3.8 ASPH and the Zeiss Biogon T* 25mm f/2.8 ZM

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	Leica Elmar-M 24mm f/3.8 ASPH	Zeiss Biogon T* 25mm f/2.8 ZM
Maker	Leica	Zeiss
Focal length	24mm (prime)	25mm (prime)
Full-frame equivalent	24mm	25mm
Maximum aperture	f/3.8	f/2.8brighter
Made for	Full frame	Full frame
Mounts	Leica M	Leica M
Stabilised	no	no
Autofocus	no, manual focus	no, manual focus
Cameras it fits	20 in this guide	20 in this guide

Focal range, in full-frame terms

Leica Elmar-M 24mm f/3.8 ASPH: 24mm.

Zeiss Biogon T* 25mm f/2.8 ZM: 25mm.

Aperture

Leica Elmar-M 24mm f/3.8 ASPH: f/3.8 wide open.

Zeiss Biogon T* 25mm f/2.8 ZM: f/2.8 wide open.

Each opening drawn to scale against f/1.4: a smaller f-number lets in more light and blurs the background more.

Field of view

How wide each sees, at each end, on the sensor it was made for.

Cameras they fit

20 cameras in this guide take both, so either works on the same body.