Today we will review Panasonic Lumix G Micro 4/3 LEICA DG SUMMILUX 25mm/F1.4 ASPH objective lens with 25 mm fixed focal length and aperture in f/1.4 – f/16 range, that is controlled by 7 diaphragm blades. It is very light and is well suited for photos taking in dark conditions : in the rooms, in a cloudy weather and at night time. It is attached to camera via Micro Four Thirds mounts and it can be used with Panasonic and Olympus devices. Field of view is 47 degrees on diagonal, minimal focusing distance is 0.3 m, lens does not support image stabilization, but it can be performed by camera by sensor shifting. Objective lens has 9 lens elements in 7 groups, 2 of them are aspherical for spherical and chromatic aberrations reduction, 1 lens element is made of UHR ( Ultra High Refractive Index ) glass. All of them are coated with protective and anti-reflective Nano Surface Coating. There is ability to attach 46 mm optical filters to it; its sizes are 63 mm ( diameter ) x 54.5 mm ( length ), its weight is 200 g. Its base is made of metal, which increases its durability. Package contains : Panasonic Lumix G Micro 4/3 LEICA DG SUMMILUX 25mm/F1.4 ASPH objective lens itself, frontal and rear caps and protective and carrying case. All in all it is very good light objective lens, which is superior in this respect to many other objective lenses with similar parameters. But there is need to note, that there is ability to find among M42x1 objective lenses similar or even better lenses for much smaller price and use them with modern camera with use of adapters and converters.