Tag Archives: camera

Notes on a tutorial about image sensor noise

Posted on 25-Dec-10 by pvdhamer

During late 2009 and all of 2010, Albert Theuwissen published an 26-part series of postings on image sensor noise on his Harvest Imaging website. The series explores various sources of image sensor noise and their relationship to signal strength. The … Continue reading →

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DxOMark Sensor for benchmarking cameras

Posted on 5-Dec-10 by pvdhamer

DxOMark provides raw benchmark information for camera bodies (DxOMark Sensor). Although DxO Labs is a commercial organization, it provides its benchmark results for free because DxO needs to measure the data anyway (e.g. for their raw converter) and because it uses the DxOMark site to increase brand awareness. The measurements and graphs are incidentally not in the public domain, but can be redistributed under certain conditions. Continue reading →

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iPad Camera Connectivy Kit

Posted on 7-Sep-10 by pvdhamer

I tested moving photos from a Canon 5D Mark II to an iPad. This can be useful if you need some extra storage, want to view the images on the iPad, or want to mail them. The 5D2 uses Compact … Continue reading →

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Save the image highlights!

Posted on 4-Oct-09 by pvdhamer

A friend pointed out an interesting background article on ISO in digital cameras by Richard Butler, a reviewer and technical writer for DPReview. It deals with ISO, dynamic range and the options that camera makers have to avoid blown highlights. … Continue reading →

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Red UFOs during long exposures with Canon 24-104mm f/4L lens

Posted on 2-Apr-09 by pvdhamer

When used for multi-minute exposures, a red flare can show up at the bottom of images taken with the Canon 24-105mm f/4L IS lens. It is due to an infrared LED used inside the lens. Low-itensity infrared light from this LED leaks to the sensor. Although the Canon 5D Mark II’s sensor is able to detect this, it should only show up on very long exposures around the lenses 24mm zoom setting. Continue reading →

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