We've rounded up the top 15 big ideas that were supposed to revolutionise technology, but beyond a few prototypes they never actually appeared. In some cases we're glad they didn't.
Silicon Film EFS-1
At the end of the Digital Imaging Marketing Association (DIMA) show in February 1998, a company called Imagek announced its Electronic Film System unit, the EFS-1, to a small group of journalists. The EFS-1 aimed to fulfill the dreams of many professional photographers: In principle, the EFS-1 would act as a replacement for a 35mm film cartridge in any camera, allowing anyone to use their existing, familiar photo equipment to take digital pictures.
Despite the considerable engineering challenges that the company faced, Imagek expected to have a working demo unit a few months later, and a sub-£500 unit on store shelves a few months after that.
Observers greeted the announcement with some skepticism, and to no one's surprise Imagek missed its target dates. However, it did release specs, some of which were admittedly modest: the (e)Film cartridge had a 1.3Mp CMOS sensor, able to fit 24 1,280x1,024-resolution uncompressed images in its on-board memory before the user needed to offload them to a computer or a CompactFlash card via the included (e)Port carrier. (The entire hardware and software package was now collectively referred to as the EFS-1.)
Because of the sensor size, the captured image would be only about 35 percent of the camera's full frame.
And forget universality for the time being: The EFS-1 worked with just seven Canon and Nikon cameras.
Aside from a name change (to Silicon Film), some website updates, and a few sample images, nothing new came out of the company until the 2001 PMA show, when Silicon Film publicly demonstrated the EFS-1, exactly three years after the initial announcement.
Skeptics were less inclined to mutter "vaporware," but the projected June release date passed with no product to be seen. That September, Silicon Film suspended operations when Irvine Sensors, a 51 percent shareholder of Silicon Film, withheld further funding over problems with European environmental standards. Irvine Sensors' press release also obliquely noted "present market circumstances", which may have been a polite way of referring to the falling prices and increasing quality of digital cameras, including SLRs.
Silicon Film's last gasp directly addressed that last point: the EPS10-SF, announced the following year, produced 10Mp images while supporting more cameras and providing a 2.5 frames per second (fps) burst rate and an LCD preview screen. And then the company was gone.
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