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Water-flow meter

1870-1900

Water-flow meter by Secretan of Paris

1870-1900

Planimeter in case

Photographic Lens

1845-1890

Current flow meter

1850

Dew-point hygrometer by Secretan

1845-1900

Achromatic Compound microscope

1845-1900

Symmetrical lens

circa 1880

Aplanat or Simple Landscape Lens.

circa 1890

Square Bellows Wet-Plate Camera, with Lens Cap

1860

Lerebours et Secretan lens c. F:14 inches, landscape achromatic type. Aperture for disc stops, approx. f/14. No.8976.

Lerebours et Secretan lens c. F:14 inches

Lerebours and Secretan landscape lens, c.20" focal length. Lens barrel in sliding mount..

Lerebours and Secretan landscape lens

Daguerreotype lens, made by Lerebours, Paris. Lens for Daguerreotype camera c.40 cm. Focal lens f/13 sliding in 13cm diameter flange. Sliding brass lens cap. C.R.R. 188.

Daguerreotype lens

Lerebours and Secretan landscape lens, c.24" focal length with brass lens cap. 12320.

Lerebours and Secretan landscape lens

Mahogany camera with fixed front panel and sliding rear panel extended to 6 1/2 cm at front to accommodate the longer focal length lens. With ground glass screen holder, one wooden single plate holder with frame 4 1/4 x 3 1/4 wet plate. Lens is a Lerebois et Secretan lens, Petzval type F:9 inch, No 3301, not original. Lens cap removed., c,1845

sliding body mahogany camera

1835-1855

Lerebours and Secretan landscape lens, c.20" focal length. Number 0468. (M17/3)

Lerebours and Secretan landscape lens

Wooden sliding box camera; with lens by Lerebours et Secretan, Serial No 5309; without plateholder; c. 1850.

Wooden Sliding Box Camera

1850

Lerebours and Secretan landscape lens. Achromatic lens in mount with reflection reducing baffles. Three disc stops; F:39cm. 9174. (M17/4)

Lerebours and Secretan lens

Petzval type lens made by Lerebours and Secretan. C. F:22cm rack and pinion focussing flange. No. 9442 with brass lens cap.

Lerebours and Secretan Petzval lens

Folding mahogany plate camera for 10x8 inch plates. Lens by Lerebours and Secretan, Paris. No 4949, F: 16 inches, 4 unmarked disc stops at lens front. Brass lens cap. Petzval type. Sliding rising front. Rack and pinion focusing on front panel. Reversible back, ground glass missing. Makers nameplate missing. With two bookform wooden double darkslides, with adaptors for smaller plates.

Folding Plate Camera with Darkslides and Adaptor

1845-1890