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We all know that small apertures (f22 and beyond) give you a great depth of field. Returning from my recent trip to Cradle Mountain, I passed these crop fields near Forth. I took this scene with a zoom lens and wanted everything to be in focus, so dialled in f22.But small apertures have an unwanted side effect. The smaller the aperture the more light diffracts (bends) as it passes through, resulting in an image on your sensor that is not as sharp as you would expect. Knowing this, I took another photo at f13.