Wynne - Antique and Vintage Cameras

Wynne's Infallible

1893

Early model

Infallible Exposure Meter Co.

Wrexham

Wales

Image of Wynne's Infallible

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
No subject table. Without Orange glass cover. Without spring inside case.

Serial Number:
129 .

1897 model

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
Black segment to cover the sensitive paper. No subject table. Without spring inside case. Aperture scale has f5.6.

Serial Number:
908 .

With:
Instructions. The black segment, described as a shutter, is mentioned as being new.

Brass model

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Construction:
Brass case with black lacquer finish. The case has a different shape to normal models. A rigid disc holds the actinic paper against the glass. A pin in the back of the case engages the disc allowing the disc to be turned by moving the meter case. On other meters this is by friction. A loose brass plate is present, behind this spare papers can be stored.

Attributes:
The plate speed and apertures share the same scale.

1898 model

Image of

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
Inside of case marked Dennison Watch Case Co. Subject table on rear of case. Orange glass cover on face.

Serial Number:
544 .

With:
Instructions. Speed list (1909). Leaflets on bromide paper. Spare sensitive papers. Packet of Rapid Deadmatch paper, price 6d, (after 1895).

Later model

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
Inside of case marked Dennison Watch Case Co. Subject table on rear of case. Orange glass cover on face.

Serial Number:
9830 .

USA model

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
Marked "Pat USA MAR 31 1896". With subject guide. Without orange glass cover.

Wynne's Infallible Snapshot

c. 1910

Image of Wynne's Infallible Snapshot

Meter Type:
Actinometer.

Calibration:
Plate speed: F4 - F362 Wynne values. Shutter speed: 1/1000 - 64m. Aperture: f4 - f362.

Attributes:
The plate speed and apertures share the same scale.

Identification:
Inside of case marked Dennison Watch Case Co. Spring inside case. With subject guide. Orange glass cover.

Serial Number:
32037 .

With:
Infallible Snapshot Instructions. Speed list (Aug. 1911). Spare sensitive papers. Packet of Rapid Deadmatch paper. Tin case.

The Wynne pre-dates the Watkins Bee meter but did not achieve the popularity of that meter. Early models had no spring in the back of the case and are without the subject guide and orange cover that protects the sensitive paper. The subject table was added in the late 1890s. Around 1897 a small black segment was added to the cover glass to protect the sensitive paper prior to exposure. In 1898 the segment was replaced by an orange glass disc mounted on the cover glass. The new cover glass was available to update older meters, as was the spring (intro. 1900) that fits into the meter case. Around 1901 the tone of the grey tint and the sensitivity of the paper was changed. The new tint was included in packets of sensitive paper. Around 1904 a US dial option was introduced and around 1910 a special dial with speeds up to 1/1000 was sold as the Infallible Snapshot Meter. A solid silver model was also offered rather than the normal nickel plated version. The aperture scale carries the value f5.6 or f5 , 5.6 tends to be early but not consistently so.

The price in 1900 was 7/6, this was soon reduced by a shilling but was still considerably more expensive than the Bee.

In use the actinic value of the light is measured by the time taken for the sensitive paper to match the standard tint, the plate speed is set against this value. The shutter speed and aperture pairs can then be read on the two scales of the meter.

The patent for the meter shows a watch shaped instrument and mentions that other forms are possible including one with a separate slide rule. A slide rule model is shown in the Photographic Journal of May 1932 and in the BJA 1894.

Dennison, Wigley & Co. was formed in 1874 when Aaron Dennison moved from America to Birmingham (England). The company continued following his death in 1895, in 1905 the company name was changed to the Dennison Watch Case Co. and survived into the 1960s.

References & Notes:
BP 10617/1893. BJA 1894, pp. 320, 820, 1314. BJA 1898, p. 350. BJA 1900, p. 336. BJA 1902, p. 1291. BJA 1905, p. 1358. BJA 1911, p. 972. N&G Cat. 1911, p. 110. Bruton, History of Clocks, p. 185. Phot. Journal May 1932, p. 206. Lon. Gaz. 2/1/1906, p. 59.

Actinometers

Stanley Actinometer

Watkins

Standard, Junior

Watch Type
Dial Meter

Bee

Queen Bee

Autochrome, Colour, Indoor
Studio, Snipe

Focal Plane, Fall, Snapshot
Kinematograph, Small Cine
Filmo

Wynne

Infallible, Snapshot

Silver Infallible, Silver Gem

Hunter Meter

Other

Adams Meters

Imperial Exposure Meter

Le Chronopose Exact
Haka Expometer
Universal

Chronoscope PAP


Meters Home page