The Lensbaby Circular Fisheye 5.8 mm f/3.5 lens is a manual fisheye lens designed for Micro Four Thirds system cameras from Olympus and Panasonic. This specialty lens captures an extreme diagonal field of view of 185 degrees and produces characteristic circular images with black edges around the image circle. With a fixed focal length of 5.8 mm and a maximum aperture of f/3.5, it allows for creative photography with dramatic perspective distortion and unique lens reflection effects. The lens has a minimum focusing distance of 6 cm from the front lens element, enabling extreme close-ups. The aperture range extends from f/3.5 to f/22, providing control over depth of field and light transmission. The lens is made in a black finish, weighs 298 grams, and features compact dimensions suitable for portable photography setups. This manual focus lens requires user adjustment for precise focusing and does not include autofocus or image stabilization systems. The optical design delivers circular fisheye distortion that creates immersive, spherical perspectives, making it ideal for artistic landscape photography, event coverage, experimental portrait photography, and creative animal photography. The lens produces characteristic circular images surrounded by black edges, creating a striking visual appearance. The package includes the Circular Fisheye lens, a user manual, and a cleaning cloth for maintenance. This lens is designed for photographers looking to explore unconventional perspectives and creative optical effects through manual control and extreme wide-angle capabilities.