Leave it to the Canucks at Thingyfy, they have created a 2x zoom lens featuring a pinhole. The Kickstarter campaign was funded in 5 hours. The campaign has closed now, but Thingyfy is using the IndieGoGo InDemand service to collect requests for perks from those whom were left out.
If you are interested in an 18 - 36mm pinhole zoom lens, check the IndieGoGo InDemand campaign here. Note that while the Kickstarter page includes a button that supposedly links to the IndieGoGo page, it draws a blank.
Mounts are available for popular cameras, including those that use film SLR lens mounts, such as Sony A, which is the same mount used on Minolta A mount camera bodies. While Canon EF and Nikon F mounts are supported, check with Thingyfy that your camera is compatible with modern versions of these lens mounts.
This would be Thingyfy's third pinhole lens venture, the previous two were successful for Thingyfy and backers. Note that crowd funded ventures have risks, even for successful campaigners.
