The Airy disk is the central bright region of the diffraction pattern produced when a point source of light passes through a circular aperture, such as a camera lens or a telescope objective. It represents the fundamental limit of resolution imposed by diffraction in an optical system with a circular pupil. When light passes through… [Read More]
Archives for June 6, 2025
A Modest Proposal
It is a melancholy object to the informed photographer, when traversing forums, YouTube comment sections, and even certain articles in the photographic press, to behold the frequent complaints of confusion arising from the concept of photographic equivalence. These complaints, sincere and repeated, inform us that equivalence is too complicated for the modern mind, too abstract… [Read More]