Tag Archives: sensor

caution, curves ahead.

Posted on July 3, 2021 by Robert

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 hidden ‘fingerprint’ in digital photos

Posted on March 28, 2021 by Robert

Toronto. For years professional photographers devised various means to identify date, subject, etc., data for each negative and print.  Amateurs were far less consistent, rarely ever marking negatives. Occasionally amateurs would use pencil or pen to annotate the back of … Continue reading →

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click, clack, clunk

Posted on March 27, 2021 by Robert

Toronto. The most important part of any single lens reflex (SLR) camera design is its mirror box. This amazing idea allows the rays from the subject, through the lens, redirected, and focussed on a ground glass at full aperture. With … Continue reading →

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it doesn’t matter anymore

Posted on March 24, 2021 by Robert

Toronto. In the early days of digital photography, the size of the sensor was very important. The larger the sensor, the lower the noise and the higher the sensitivity. This led to compact digital cameras and then digital SLR cameras … Continue reading →

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Alice is at it again

Posted on October 29, 2020 by Robert

Toronto. After film’s popularity surged in 1880 with the famous Kodak camera, the race was on to increase its detail (resolution) and speed. By the time film faded from popular use, both resolution and speed had increased significantly. A friend … Continue reading →

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That Film Plane Thing Again

Posted on June 1, 2017 by Robert

Toronto. Well over a half century ago a young Latvian designed the amazing Minox spy camera. For a time, some models used a novel idea to add to the lens correction – the film plane was slightly curved along its longer … Continue reading →

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250 Megapixels anyone?

Posted on September 15, 2015 by Robert

Toronto. Russ Forfar, owner of Kominek Camera Repair, sent me an email mentioning that Canon has announced a monster 250 megapixel sensor this month as reported on the AIP Scitation web site last week. This sensor is a smallish size APS-H … Continue reading →

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