The Panasonic Leica DG Summilux 25mm 1.4 lens is a normal lens

Normal lens

In photography and cinematography a normal lens, also called a standard lens, is a lens that reproduces perspective that generally looks "natural" to a human observer under normal viewing conditions, as compared with lenses with longer or shorter focal lengths which produce an expanded or...

 for Micro Four Thirds system

Micro Four Thirds system

The Micro Four Thirds system is a standard created by Olympus and Panasonic, and announced on August 5, 2008, for mirrorless interchangeable lens digital cameras and camcorders design and development...

 cameras. It is co-branded between Leica and Panasonic, built in Japan under Leica management.

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 G 14mm lens

The Panasonic Lumix G 14mm 2.5 lens is a pancake-style prime lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is moderately wide. As of its late-2010 release, it is claimed by Panasonic to be the lightest interchangeable digital-camera lens...

, Panasonic Lumix 20mm

Panasonic Lumix 20mm lens

The Panasonic Lumix 20mm 1.7 lens is a pancake-style prime lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is slightly wider than normal. It was the prime-lens option available with the GF1....

, Panasonic Leica 45mm

Panasonic Lumix 45mm lens

The Panasonic Lumix 45mm 2.8 lens is a macro lens for Micro Four Thirds system cameras. It is co-branded between Leica and Panasonic, built in Japan under Leica management.The lens has a hardware stabilization switch...

, and Olympus 12mm

M. Zuiko Digital ED 12mm f/2 lens

The M.Zuiko Digital ED 12 mm f/2 is a Micro Four Thirds System Prime lens by Olympus Corporation. In the Micro Four Thirds format, it is a wide- or ultra-wide lens....

lenses.

Reviews are positive, ranging from "very sharp" to "sensational".