Tag Archives: lens

cat’s eye

Toronto. Nearly a century ago, there was a race on to create a faster lens. Such a lens would allow photos  indoors and at night using natural light. In 1924 Ernemann announced the Ermanox plate camera (4.5×6 cm) with a … Continue reading

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was ist das?

Toronto. Post WW2, umpteen American companies tried to hop on the American made camera bandwagon. One was the Vokar line made in Dexter, Michigan. The design was said to have originated pre war from the mind of Dick Bills. Mike … Continue reading

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Voigtlander cameras are here again

Toronto. How do you get back your market share when your country was on the losing side of the war? Well. you can try to advertise in a magazine that is read by your potential  market. Voigtlander did. The famous … Continue reading

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caution, curves ahead.

Toronto. Traditional lens elements (before aspheric surfaces became economical) were all slices of a sphere making curvature of field common. Some added elements resolved this aberration to give a flat field at the film/sensor plane. Some cameras use a curved … Continue reading

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a little slip of a thing …

Toronto. … said my mother in describing a skinny young girl. She could just as easily have been describing a Waterhouse stop, or a leaf in a photographic iris diaphragm. In fact, have you ever wondered when and who invented … Continue reading

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one camera’s wide angle …

Toronto. … is another camera’s telephoto. Did you ever wonder why the tiny smart phone camera has an equivalent 35mm camera size? For example my iPod Touch camera has a 3.3mm, f/2.8 lens but images it takes are considered to … Continue reading

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if not for you …

Toronto. … my lens would unscrew. Photographers know that the infinity focus setting sets the lens at its closest to the film/sensor plane. For close-ups, the lens is extended further from the film/sensor plane. Box cameras for film often had … Continue reading

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The Amalgamated Photo History Newsletters Vol 2-4 (April 2021)

Toronto. The Australian Back Focus issue plus some old articles are reproduced here in our special members-only supplement, this time its the June 2020 issue of Back Focus. As a member of the PHSC, you received this supplement Friday, the 23rd … Continue reading

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like a surgeon

Toronto. A fitting title in this pandemic crisis we face today! The camera you see here is the Wirgin Gewirette v.1 manufactured by the Wirgin company in Wiesbaden, Germany. This particular camera predates the 35mm minicam revolution. It uses 127 … Continue reading

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a camera fit for a Queen

Toronto. The German optical firm of Ernst Leitz began as a maker of optical objects including microscopes. In the mid 1920s to keep its factory open and staff working, Leitz began the sale and manufacture of the 35mm Leica camera … Continue reading

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