A few months ago, there was a Kickstarter campaign for a 'professional' pinhole 'lens' for digital cameras. And because I really like to photograph with pinhole cameras - and I'm also quite a fan of this whole Kickstarter idea and always like to participate in such projects, I signed up as a supporter.
A few years ago I already tried  a pinhole cap on the Nikon but honestly the results were simply not interesting at all.
But this was a new development, a new idea, that was worth a try.