Quote:
Originally Posted by Clodfobble
But my retina doesn't move like the left-side line in your picture.
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That's right. Your eyes have a fixed focal length and thus a fixed angle of view.
Quote:
Originally Posted by Clodfobble
What about when the left line sits still, but the two lines on the right move farther apart from each other (up and down, respectively)?
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That doesn't affect your angle of view, that changes your depth of field, or degree of sharpness.
degree as in extent, not fraction of a circle.