It's got to be more than just a typical speedbooster, given that they have to adapt a comparatively huge focal plane to a lens aperture about 3mm in diameter. T

It's got to be more than just a typical speedbooster, given that they have to adapt a comparatively huge focal plane to a lens aperture about 3mm in diameter. The article speculates that they use some sort of lens relay system, perhaps with an aerial image rather than a ground glass intermediate, but doesn't provide any more information. I'd love to see a detailed technical explanation.