Astrophotography Lens Review: Samyang 12mm f/2.8 Fisheye

Samyang Optics recently started building autofocus lenses. This 12mm fisheye is not of those. Now, some of you may know this lens as being built by Rokinon. It's the same lens, just marketed differently. This one should also not be confused with the 12mm f/2.0 CS. That’s regular, rectilinear wide-angle glass that’s been built for crop-sensor cameras.