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Search Results: Use of optics by Renaissance artists

An extensive visual investigation by the artist David Hockney, supported by optical evidence detailed in subsequent technical papers, shows that...


= Encyclopedia Article; = Research Update
Figure 1.Projection of an image by a camera obscura.
Figure 2.Projection of an image by a concave lens.
Figure 3.Simplified diagram showing the distortion of a simple octagonal pattern that occurs as a result of having to refocus due to exceeding the depth of field of a lens, resulting in a change of magnification of the projected image. The artist sketches the lattice in the front first (guided by the black area), then refocuses and matches the pattern as best as possible to sketch the back (guided by the white area). The resulting overall octagonal pattern is severely distorted, yet still appears to be a reasonable octagon.
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