* Stereo views: (1880 - 1890's) One of Huffman's first cameras was stereoscopic (2 lenses about eye width apart).  The resulting stereo view card, when viewed through a stereoscope, gives a three dimensional effect. Most of Huffman's earliest images were taken with this type of camera.  His 1883 catalog indicates he had already produced several hundred stereo views.  Photos taken and made in 1880 - 81 were on orange, green or buff colored mounts; sometime in 1882 he started using yellow mounts.  He continued to make stereo views, on yellow mounts, until at least into the 1890's.