Lets review wide-angle photo lens Sigma 19mm f2.8 DN. It is produced in variants for Micro Four Thirds ( for Panasonic and Olympus cameras ) and Sony E mounts. Its focal length is fixed and equals to 19 mm, diaphragm can be set in f/2.8 – f/22 range with use of 7 blades. Minimal focusing distance is 0.2 m, field of view is 59.3 degrees for Sony E mounts and 1:7.4 maximal magnification. Lens supports auto focusing and internal focusing; motor, that moves optics, is quiet and lens is useful for videos recording. It has 8 lens elements in 6 groups ( 3 of them are aspherical for chromatic and geometric distortions correction ), all elements are coated with Super Multi-Layer Coating. 46 mm optical filters can be attached to it. Lens sizes are : 60.8 ( diameter ) x 45.7 ( height ) mm; weight is : 160 g. It is released in black and silver color variants. Package contains : Sigma 19mm f2.8 DN photo lens itself, frontal and rear caps, storage and carrying case and user’s guide. All in all, this is a high-quality wide-angle lens, which is useful for photos and videos recording and which has optimal price. Its minus is relatively big amount of lens elements for fixed focus lenses, but most of them have around so amount of glasses.