Test: Optical performance of Nikonos 15mm, flat and dome ports
Inventor, manufacturer and filmmaker Pawel Achtel shares his tests of the performance of cinema lenses behind flat and dome ports as well as the use of the Nikonos 15mm wide-angle lens. They were tested using a RED Epic camera in 5K mode, shooting Spatial Frequency Response charts underwater with the camera held in a rigid frame to ensure repeatable results.