This is very interesting indeed, but at an equivalent f/555 I don't see many practical applications for this either. For context, usual photography uses apertures from f/1.2 to f/11, with lower numbers letting being a larger aperture and thus more light in. It'd require a massive amount of light to get a usable image.
Maybe the images could be sharper with this lens, or have very good macro? As you stop down (increase the aperture number) images become sharper up to a point where the diffraction limit steps in and quality degrades; usually this happens at f/9 to f/11 (which is why I mentioned f/11 as the lower range of commonly used apertures; although almost all lenses can go smaller, for pixel-peeping quality you'd want to use an ND filter and f/11 aperture).
This is very interesting indeed, but at an equivalent f/555 I don't see many practical applications for this either. For context, usual photography uses apertures from f/1.2 to f/11, with lower numbers letting being a larger aperture and thus more light in. It'd require a massive amount of light to get a usable image.
Maybe the images could be sharper with this lens, or have very good macro? As you stop down (increase the aperture number) images become sharper up to a point where the diffraction limit steps in and quality degrades; usually this happens at f/9 to f/11 (which is why I mentioned f/11 as the lower range of commonly used apertures; although almost all lenses can go smaller, for pixel-peeping quality you'd want to use an ND filter and f/11 aperture).