D.F. Vasconcellos S.A. (owned by Decio Fernandes de Vasconcellos) was a camera maker in São Paolo, Brazil. The company made cheap and simple cameras. Vasconcellos also produced an 'Optical Set'; a kit of optical components and mountings to allow students to study optics, and construct microscopes, telescopes etc. by assembling the elements.
- Bieka (metal-bodied 6x9 cm box camera, as pictured here)
- Flika (plastic camera for 6x9 or 4.5x6 cm on 120 film)
- Kapsa (plastic-bodied box camera for 6x9 or 4x6 cm on 120 or 620 film)
- Plik (a close copy of the Bilora Boy; bakelite box camera for 4x6.5 cm on 127 film)
- Tuka (plastic camera for 127 film. McKeown compares it to the Ansco Cadet II and III, and suggests Vasconcellos may have acquired the Ansco moulds. The Tuka lacks the Cadet's 'B&W/Color' film selector dial, but the Zina has this control)
- Zina 25 (cream-coloured plastic camera for 127 film; as above, a copy of the Ansco Cadet II, with a selector dial for B&P (branco e preto; white & black) or Cores (colour) film)
- McKeown, James M. and Joan C. McKeown's Price Guide to Antique and Classic Cameras, 12th Edition, 2005-2006. USA, Centennial Photo Service, 2004. ISBN 0-931838-40-1 (hardcover). ISBN 0-931838-41-X (softcover). p944-5.
- US Patent 3112570 of 1963, Optical Set, at Espacenet, the patent search facility of the European Patent Office.
- Cameras Antigas shows pictures of the Bieka (19th camera from the top, in a very long page, with bright yellow leatherette - perhaps re-covered), Plik, Tuka (41st picture from the top) and Zina 25.