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Most imaging systems, such as those found in digital cameras, use a lens to focus a scene on a sensor studded with millions of tiny sensors.
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"IR cameras cannot 'see' objects or humans behind flames because of the need for a zoom lens that concentrates the rays on the sensor to form the image, " he said.
BBC: fire fighting
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Specification details are also quite spotty at the moment, but we were able to confirm that there will be an Exmor R CMOS image sensor and a wide-angle Carl Zeiss Tessar lens on board.
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"IR cameras cannot 'see' objects or humans behind flames because of the need for a zoom lens that concentrates the rays on the sensor to form the image, " says Pietro Ferraro of the Consiglio Nazionale delle Ricerche (CNR) Istituto Nazionale di Ottica in Italy.
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And this camera, as with its cheaper siblings, has the sensor built into the lens, oddly, which Polaroid is convinced with cut down on dust and scratches.
ENGADGET: Polaroid's interchangeable lens cameras hands-on (video)
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The high-performance 50mm F2.8 lens has the equivalent angle of view as 75mm on a 35mm lens, and it has been designed exclusively for the SIGMA DP3 Merrill to maximizes the sensor performance.
ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens