Shoot superwide 250° or circular images with the HAL 250 3mm Superwide Fisheye Lens from Entaniya. This Micro Four Thirds-mount/format lens produces a 250° or 180° field of view depending on your camera's sensor size and aspect ratio. Instead of an iris ring that controls the aperture blades, this f/2.8 lens uses a set of f/4, f/5.6, f/8, and f/11 aperture rings that must be manually swapped with the included tool. You can also adjust the exposure using the included ND0.6 and ND1.2 filters. See the chart on the Entaniya site for detailed sensor coverage information.
Angle of View
The HAL 250 lens boasts a superwide 250° when using the entirety of your Micro Four Thirds sensor. Select a 16:9 aspect ratio to make the image appear wider by cropping the top and bottom. This reduces the vertical angle of view to 180°, flattening the top and bottom edges.
Aperture Rings
The process of changing the aperture is more complicated than turning an iris ring, requiring you to remove the lens from the camera, open the rear of the lens with an included hand tool, and swap one aperture ring for another. The included set of ND0.6 and ND1.2 filters enables you to adjust your exposure without needing to swap out the aperture ring.
Extra-Low Dispersion Elements
Four of the 18 elements of the lens are made with extra-low dispersion glass. This preserves the image's finer details while reducing chromatic aberration and color fringing.