Stephen Bay's Photography Blog

Semi-Automatic Focus Stacking on Sony Cameras

With today’s high resolution cameras, focus stacking is pretty much a necessity to get the maximum detail out of the sensor. Even with wide angle lenses, it is hard to get enough DOF to cover the foreground to the background and have everything sharp when viewed at 100% magnification. You could stop down to increase the DOF but this actually doesn’t work well with high megapixel sensors as exceeding even f/8 can result in a loss of resolution due to diffraction.

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Diffraction, Aperture, and High Megapixel Cameras

While I was out on my last shoot, I did a quick test to show the effects of diffraction on image sharpness. If you don’t know what diffraction is, here is the dictionary definition: Diffraction is the process by which a beam of light spreads out after passing through a narrow hole or across an edge. Practically what this means is that when you use physically smaller apertures, the light passing through the lens spreads out more.

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