Originally Posted by
Barry Santini
Challenge question: Why would the aberration known as "curvature of field" be significant for the human eye? The retinal plane is curved, is it not?
In telescope design, with which I am familiar, we were, *for visual use*, not too concerned with curvature of field issues from the objective. We would just ensure that the eyepieces we designed had a *matching* curvature of field, and there would be no edge-of-field defocus apparent to the viewer.
Matching focal plane curvatures is what we are after, or at least *not* mismatching them.
FWIW
Barry
PS - The above did not apply to scopes that were used with film/CCDs. They obviously require demand a flat focal plane.
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