The YN25mm f/1.7 Prime Lens from Youngnuo is a standard focal length prime lens for Micro Four Thirds mirrorless cameras. It is the equivalent perspective of a 50mm focal length for 35mm format. This standard-length lens is suitable for use for landscapes, portraiture, street photography, night scenes, and indoor photography. The bright, fast f/1.7 aperture allows use in in low light situations and combines with the 7-blade aperture for creamy bokeh. The high precision STM stepper motor achieves fast, quiet and precise focus, and the focusing ring can be rotated to full-time manual focus. The lens barrel features an AF/MF focus switch, allowing autofocus or manual mode focus selection.