Which optical effect, described by Ibn al-Haytham, explains image sharpness limitations in early camera obscura designs?

💡 Explanation

When a pinhole camera obscura uses a larger pinhole, increased light throughput leads to greater spherical aberration because rays from the edge of the pinhole don't focus at the same point as paraxial rays, reducing sharpness. Therefore spherical aberration limits sharpness, rather than chromatic aberration, coma, or astigmatism, which depend on lens material/alignment/grinding flaws.

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