The Panasonic Leica DG Summilux 25mm f/1.4 lens is a normal lens for Micro Four Thirds system cameras. It is co-branded between Leica and Panasonic, built in Japan under Leica management.

DG Summilux 25mm

Maker	Panasonic
Technical data
Type	Normal
Focal length	25mm
Focal length (35mm equiv.)	50mm
Aperture (max/min)	f/1.4 - f/16
Close focus distance	0.3 m (0.98 ft)
Max. magnification	1.1
Diaphragm blades	7 blades, round
Construction	7 elements in 9 groups
Features
Lens-based stabilization	No
Physical
Max. length	54.5 mm (2.1 in)
Diameter	63 mm (2.5 in)
Weight	200g (7.0 oz)
Filter diameter	46 mm
Angle of view
Diagonal	47 deg.
History
Introduction	2011

Focusing is internal, so polarizing filters can be used consistently. The 46mm thread lets a Micro Four Thirds user share filters between it, the Panasonic 14mm, Panasonic Lumix 20mm, Panasonic Leica 45mm, Panasonic 45-175mm, Olympus M.Zuiko Digital ED 12mm f/2 and Olympus M.Zuiko Digital ED 60mm f/2.8 Macro lenses.

Reviews are positive,^[1][2] ranging from "very sharp"^[3] to "sensational".^[4]