Finney 4"x4" Pinhole Zone Plate Turret

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Finney 4"x4" PINHOLE ZONE PLATE TURRET New, never used, pristine condition and VERY RARE
Made of brass, mahogany and steel, this very rare (no longer being manufactured) 4"x4" Pinhole and Zone Plate turret will fit most view cameras or homemade-to-fit camera.
4 pinholes (focal lengths 40mm, 75mm, 250mm and 200mm)
3 zone plates (focal lengths 75mm, 150mm and 200mm)
1 viewing pinhole
filter holder behind turret
cable release spring activated shutter (cable release not included)
This beautifully crafted turret works by turning the dial and pinhole or zone plate clicks into place. Each pinhole and zone plate setting is engraved with the focal length of the pinhole or zone plate. A truly wonderful turret, it makes photographing with a pinhole or zone plate extremely efficient at variable focal lengths. Pinholes and zone plates are optimal sharpness for focal lengths shown.
Price:
Sales price: $495.00
Description
Finney 4"x4" PINHOLE ZONE PLATE TURRET New, never used, pristine condition and VERY RARE
Made of brass, mahogany and steel, this very rare (no longer being manufactured) 4"x4" Pinhole and Zone Plate turret will fit most view cameras or homemade-to-fit camera. 
4 pinholes (focal lengths 40mm, 75mm, 250mm and 200mm)
3 zone plates (focal lengths 75mm, 150mm and 200mm)
1 viewing pinhole
filter holder behind turret
cable release spring activated shutter (cable release not included)
This beautifully crafted turret works by turning the dial and pinhole or zone plate clicks into place. Each pinhole and zone plate setting is engraved with the focal length of the pinhole or zone plate. A truly wonderful turret, it makes photographing with a pinhole or zone plate extremely efficient at variable focal lengths. Pinholes and zone plates are optimal sharpness for focal lengths shown. 
Units in box: 1