Fisheye lenses are designed to support MegaPixel resolution cameras across a 185° field of view. Their large depth of field eliminates the need for focus adjustment, and allows the lenses to be sharply focused between 100mm and infinity. A lockable iris adjustment enables control over the exposure without changing integration time, and stays locked in place to prevent accidental alteration. This lens is excellent for space-constrained applications where large fields of view are required at short working distances. *FOV for ½” format sensor.
Fisheye lenses have a larger back focal distance and a front group with a higher negative refractive index than a normal inverted wide angle lens. The extreme power distribution of the lens will result in a large field curvature. To improve field curvature, astigmatism and avoid barrel distortion caused by fisheye lenses, it is important to use a doublet.
Based on how the image circle fulfills the camera sensor, camera fisheye lenses can be categorized by two different types: diagonal fisheye lens and circular fisheye lens. A diagonal fisheye is a fisheye that has a 180 degree field of view on the diagonal. The horizontal and vertical fields of view are less than 180 degrees for this type of fisheye lens. A circular fisheye is a fisheye that has a 180-degree view of the sensor. The corners of an image are black because the diagonal length of a rectangular image sensor is greater than the diameter circle fisheye.
The focal length of fisheye lenses is short and its value is determined by the sensor format. For a (35 mm film) full frame sensor, usually focal length of fisheye lenses is not larger than 10 mm for circular images, and not larger than 16 mm for full-frame images. The focal length of fisheye lenses can be as short as 1 to 2 mm for digital cameras using smaller electronic imagers such as, 1⁄4 “, 1⁄3″ and 1⁄2” format CCD or CMOS sensors.
SUPERIOR® Optics design and produce high quality fisheye lenses that are used in a wide range of digital cameras with sensors from 1⁄4 “, 1⁄3″ and 1⁄2” to large format including fourth thirds sensor and 35mm film format.
What the demands of the fisheye lens does meet to work with High Quality Camera?
In order to meet the new demands of the lens to work with High Quality Camera, SUPERIOR® Optics selected and tested a wide range of M12 mount lenses from long focus to fisheye for shooting on your HQ cameras. It’s now much easier for you to get the best lens you’ll need, and we will keep the lens list growing in the near future. 
An M12 lens with a 180° FoV is capable of capturing a 5.7 x 4.27 m (18.70 x 14.02 ft) scene at a 1-meter (3.28 ft) distance.
What are fisheye lenses used for the High Quality Camera:
Lightweight: It’s tiny and takes less space than the official lenses.
Cost-effective: You get more options with the equivalent amount of money.
Project-centric: Different projects lead to different lens requirements, you need lenses with certain FoVs for specific needs as the notion of one-lens-fits-all gets impractical from time to time.
OEM-ready: Unlike C/CS mount lenses, M12 lenses are highly customizable in regards to product designs.
