I impulsively bought a nice Voigtlander Avus 9x12cm plate camera in very good shape from eBay, and it came with something I'd never heard of before, a Kodak adapter for full-frame 35mm. No dark-slide is needed: you slide the 35mm adapter up and down on its mounting plate. Beneath the film body there is a small box that contains a 24x36mm ground glass. The film pressure plate is a MIRROR, instead of being the usual matte-black. (This has gotta cause internal flare, right? I can't figure why Kodak used a mirror...) Before I waste (?) a roll of film, anyone ever use one of these crazy adapters? Any problems with light leaks or the film plane being out of register with the ground glass? Also, with the typical 135mm Tessar lens covering 9x12cm, does the 2.4x3.6cm portion recorded have enough decent sharpness for at least a 4x6" snapshop? Thus far the only application I can think of for this oddball gadget is to cheaply compare center sharpness of my several view and plate camera lenses. Thanks for any info; Leigh in Santa Barbara, Calif.