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Lecture 15: Cameras & Lenses (92)

When there is a shallow depth of field, an image feels sharper than when there is a wide DOF. I think this is because of the contrast between the in-focus elements and the background. The circle of confusion at in-focus points should be the same since zs=ziz_s = z_i. I find this interesting since sharpness in an image is therefore more about contrast of focus in the image rather than how focused the photons are at the sensor.

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