Lensless Camera Manufacturing Co. Finney Turret

Pinhole+Zone Plate TurretMount: Pinhole / Zone Plate

Finney Turret is a multi-aperture pinhole/zone-plate turret manufactured by Lensless Camera Manufacturing Co. — a precision-machined disk mounted to a large-format lens board carrying multiple pinhole and zone-plate apertures of different diameters and focal lengths on a single rotating turret. Selecting between options is a single click of the turret rather than swapping mounted optics.

Key features

  • Multiple pinhole and zone-plate options on a single rotating turret
  • Large-format lens-board mount — sized for 4×5 (Linhof/Sinar/Toyo standard) and 8×10 board sizes
  • No glass elements
  • Click-stop turret rotation — repeatable aperture selection
  • Effective apertures range from approximately f/100 (faster pinholes) to f/300+ (smaller pinholes / wider zone-plate options)
  • Manufactured by Lensless Camera Manufacturing Co. (Tom Persinger / lenslesscamera.com)

Use case + rendering

The Finney Turret is the professional pinhole / zone-plate solution for large-format alternative-process workflow. Photographers can select among effective focal lengths and rendering characteristics in seconds without remounting hardware — invaluable in field work where light changes quickly. Each turret position offers a distinct aesthetic: smaller pinholes for sharper geometric softness, larger pinholes for more dramatic softness, zone-plate positions for halo effect.

Common pairings: 4×5 view cameras (Toyo, Sinar, Linhof, Wista) for landscape and architectural alternative-process work; 8×10 for contact printing alternative-process prints (palladium, cyanotype, gum-bichromate) where the softness of pinhole/zone-plate complements the printing technique.

Compatible bodies

Related lenses