I just purchased a 1950 Voigtlander Bessa I folder, with the Voigtlander Vaskar 105mm f/4.5 lens. It uses 120 film, & produces a whopping 8 frames of 6x9 cm per roll. I got the mask for it also, & can get 16 frames of 6x4.5 cm per roll. I do not have the Voigtlander Focar 1 or 2 close up aux. lenses, but do have the Series VI Kodak Portra #1, #2, & #3 close up aux. lenses. Does anyone out there in the ether know if the focus charts for the Portra lenses work with the Voigtlander 105mm Vaskar? Thanks. If push comes to shove, I can open the back, block the shutter open, & put a ground glass of sorts on the film plane, & then focus & measure, etc., to see if the charts for the Portra lenses work for this camera or not. If not, I could, given the time, produce my own charts, but, whew, I get tired just thinking about it.