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VINTAGE PHOTOGRAPHY / CINEMATOGRAPHY TOOL

Maker:Weston Electrical Instrument
Model:Master II (Model 735)
Circa: 1945
Original Price: $30
Cell type: Selenium 
Designer: Alexander Williams
US Patent: 2,528,716
Measure type: Reflecting/Averaging (3D incident available as accessory)

The Weston Master II (model 735)
Weston model 735 was called the Weston Master II Universal
Exposure meter. It was introduced in 1945 and made through 1953.

An important family of photographic exposure meters is the Weston
Master family. The series has a fascinating history with respect to the
meters themselves and with respect to the firms involved. In this
article I try to paint the overall picture of this family and its story, and
describe the meters in it (actually starting with one that is just before
the family proper). 

The exposure calculator
The overall principle of the exposure calculator of the Weston Master
II is as described in Appendix B. Dial Y is moved with a small tab
adjacent to the exposure index window (marked "emulsion speed"; the
setting was in the Weston system). But before it can be moved, a
small button at the "bottom" of the dial (that is, the bottom if the
meter were held vertically) must be pushed. That way the setting
could not be accidentally changed.
This model was made in Newark, New Jersey by Weston Electrical
Instrument Corp. for the American Market, but for the European
market it was made (under a different model number) in Great Britain
by Sangamo-Weston, a related firm.
Incident light metering
During the life of this model, provisions were made for it to be used in
an incident light mode. The details are found in section 3. of this
article.
Zero adjust
The zero adjusting "screw" is now on the rear of the meter, as well
be true of all subsequent models. 

INCLUDES ORIGINAL PAPER BOX
AND ASSORTED EPHEMERA
INCLUDING 
INSTRUCTION MANUAL
WARRANTY CARD
AND VARIOUS KODAK / KODACOLOR PIECES


 ----------------------
FYI

 
 

Photography is the process, activity and art of creating still or moving pictures by recording radiation on a radiation-sensitive medium, such as a photographic film, or electronic image sensors. Photography uses foremost radiation in the UV, visible and near-IR spectrum. For common purposes the term light is used instead of radiation. Light reflected or emitted from objects form a real image on a light sensitive area (film or plate) or a FPA pixel array sensor by means of a pin hole or lens in a device known as a camera during a timed exposure. The result on film or plate is a latent image, subsequently developed into a visual image (negative or diapositive). An image on paper base is known as a print. The result on the FPA pixel array sensor is an electrical charge at each pixel which is electronically processed and stored in a computer (raster)-image file for subsequent display or processing. Photography has many uses for business, science, manufacturing (f.i. Photolithography), art, and recreational purposes.

As far as can be ascertained, it was Sir John Herschel in a lecture before the Royal Society of London, on March 14, 1839 who made the word "photography" known to the whole world. But in an article published on February 25 of the same year in a german newspaper called the Vossische Zeitung, Johann von Maedler, a Berlin astronomer, used the word photography already. The word photography is based on the Greek φ?ς (photos) "light" and γραφ? (graphe) "representation by means of lines" or "drawing", together meaning "drawing with light".

The camera or camera obscura is the image-forming device, and photographic film or a silicon electronic image sensor is the sensing medium. The respective recording medium can be the film itself, or a digital electronic or magnetic memory.

Photographers control the camera and lens to "expose" the light recording material (such as film) to the required amount of light to form a "latent image" (on film) or "raw file" (in digital cameras) which, after appropriate processing, is converted to a usable image. Digital cameras use an electronic image sensor based on light-sensitive electronics such as charge-coupled device (CCD) or complementary metal-oxide-semiconductor (CMOS) technology. The resulting digital image is stored electronically, but can be reproduced on paper or film.

The movie camera is a type of photographic camera which takes a rapid sequence of photographs on strips of film. In contrast to a still camera, which captures a single snapshot at a time, the movie camera takes a series of images, each called a "frame". This is accomplished through an intermittent mechanism. The frames are later played back in a movie projector at a specific speed, called the "frame rate" (number of frames per second). While viewing, a person's eyes and brain merge the separate pictures together to create the illusion of motion.

Photography is the result of combining several technical discoveries. Long before the first photographs were made, Chinese philosopher Mo Di and Greek mathematicians Aristotle and Euclid described a pinhole camera in the 5th and 4th centuries BC. In the 6th century CE, Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his experiments, Ibn al-Haytham (Alhazen) (965–1040) studied the camera obscura and pinhole camera, Albertus Magnus (1193–1280) discovered silver nitrate, and Georges Fabricius (1516–1571) discovered silver chloride. Daniele Barbaro described a diaphragm in 1568. Wilhelm Homberg described how light darkened some chemicals (photochemical effect) in 1694. The fiction book Giphantie, published in 1760, by French author Tiphaigne de la Roche, described what can be interpreted as photography.

Invented in the first decades of the 19th century, photography (by way of the camera) seemed able to capture more detail and information than traditional mediums, such as painting and sculpting. Photography as a usable process goes back to the 1820s with the development of chemical photography. The first permanent photoetching was an image produced in 1822 by the French inventor Nicephore Niepce, but it was destroyed by a later attempt to duplicate it. Niepce was successful again in 1825. He made the first permanent photograph from nature with a camera obscura in 1826. However, because his photographs took so long to expose (8 hours), he sought to find a new process. Working in conjunction with Louis Daguerre, they experimented with silver compounds based on a Johann Heinrich Schultz discovery in 1816 that a silver and chalk mixture darkens when exposed to light. Niepce died in 1833, but Daguerre continued the work, eventually culminating with the development of the daguerreotype in 1837. Daguerre took the first ever photo of a person in 1839 when, while taking a daguerreotype of a Paris street, a pedestrian stopped for a shoe shine, long enough to be captured by the long exposure (several minutes). Eventually, France agreed to pay Daguerre a pension for his formula, in exchange for his promise to announce his discovery to the world as the gift of France, which he did in 1839.




(for display only)

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