» Posts Tagged ‘diffraction’

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The most common way we get color images with digital cameras is with a Bayer pattern CMOS sensor, but there are plenty of variations on that design being used today. The upcoming Aaton Penelope Delta uses a Bayer pattern over a Dalsa CCD, for example, while the RED EPIC-M Monochrome uses the MX CMOS sensor foregoing color filtration entirely. By their very nature, though, color filters of any kind cut down the amount of light transmitted to the sensor. That’s why Panasonic is developing a brand new type of color filter that will employ diffraction to split up the color spectrum, instead of filtration, and thus will be capable of doubling the light sensitivity of the sensor. More »

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Exposure is one of the most important aspects of shooting with DSLRs. If you’re new to shooting with digital cameras, it can be a bit overwhelming to fully understand all of the terminology and the options for controlling the exposure of the image. Film is pretty straightforward, where the film speed (or ISO, ASA, etc.) does not change. Shooting pictures is a bit more complicated, as the film speed can change, so you’ve got aperture, shutter speed, and ISO as three different settings to affect exposure. Shooting video is a bit different, as the shutter speed of DSLRs will typically not go below 1/30 of a second. We’ve got two videos explaining exposure and control, with the first being a beginner’s guide to overall exposure, and the second explaining what happens as you stop down your lens. More »