Lensbaby Spark: This lens is ideal for young enthusiasts, students or beginner photographers who want to break out of traditional photography. The Spark is a fun, affordable way to capture selective focus images with your DSLR camera. It features a unique selective focus optic and a tilting lens body—allowing users to capture creative images in-camera that have a sweet spot of focus surrounded by blur. It is an all plastic (except for multi-coated glass doublet optic) 50mm selective focus lens with a f/5.6 fixed aperture made for use with for Canon and Nikon DSLRs. Spark is compatible with the rest of the optics in the Optic Swap System, and with all Lensbaby 37mm threaded accessory lenses. The suggested retail price is $89.95.