If you're looking for a versatile and affordable wide-angle prime lens for your Micro Four Thirds camera, the Sigma 19mm F2.8 EX DN lens is worth considering. This lens is manufactured by Sigma and offers a range of features that make it a great choice for landscape, street, and general photography.
The Sigma 19mm F2.8 EX DN lens has a fixed focal length of 19mm, which makes it ideal for capturing wide-angle shots of landscapes, buildings, and other subjects. The maximum aperture of f/2.8 allows for good low-light performance and nice bokeh, but it's worth noting that this lens doesn't have a zoom function.
The Sigma 19mm F2.8 EX DN lens features an autofocus system that allows you to quickly and accurately focus on your subject. However, it's worth noting that this lens does not have optical image stabilization, which means that you may need to use a tripod or increase your shutter speed to avoid blurry shots.
One of the benefits of the Sigma 19mm F2.8 EX DN lens is that it's compact and lightweight, weighing in at just 140 grams. Its filter diameter is 46mm, which is a standard size, and its measurements are 61mm in diameter and 46mm in length, making it easy to carry around with you wherever you go.
Overall, the Sigma 19mm F2.8 EX DN lens is a versatile and affordable wide-angle prime lens that's well-suited for a variety of photography styles. Its autofocus system and compact design make it a great option for on-the-go shooting, although its lack of optical image stabilization means you may need to take extra care to avoid blurry shots. If you're looking for an affordable lens that offers good performance in low-light situations and a wide field of view, this lens is definitely worth considering.