Fisheye lens reviews (WYSIWYG)
Fisheye lenses have a very short focal length. Fisheye lens on a camera gives an extreme wide angle and a typical barrel distortion. The performance of the lenses in this table are based on " What you see is what you get (WYSIWYG )", as you save images in the camera as a jpg file, with all the in- camera lens corrections applied ("What you see is what you get ": WYSIWYG").
If a lens is tested on a camera with an APS-C or micro-43 sensor, then the focal lengths have been converted to the equivalent field of view for a camera with a full frame sensor ( mm @ ff ). Because of this conversion, you can compare lenses on cameras with different sensor types. Note thet lens scores are determined by the test camera being used (megapixels , sensor size, jpg conversion).