aperture Definition

orifice, ovate, lunate, semicircular, cleft, seam, slit, hole, slot, mac, inclusiveness, transparency, opens, openness, open, operation, opening, introductory, port, commencement, keynote, outlet, crack, opened, initiation, opener, overture, chink, commence, unlock, beginning, open-endedness, open-mindedness, ouverture, semilunar, subquadrate, launching, release, start, viewfinder, chromatic aberration, lens, focal length, collimator, zoom lens, magnification, eyepiece, autofocus, telephoto, pinhole, fisheye, defocus, collimation, emissivity, spherical aberration, iris diaphragm, parallax, arcsecond, pentaprism, diffraction, vignetting, camera lens, brightness, monochromator, reticle, luminance, photodiode, micrometer, diopter, photodetector, passband, photometry, photodiodes, convex lens, fovea, workpiece, wavefront, absorption coefficient, flashgun, chroma, detents, optics, photometer, transmittance, capacitances, imager, colorimetry, nosepiece, waveguide, transmissivity, illuminance, platen, phototransistor, image intensifier, illuminator, toroidal, convex, collet, circular polarization, coronagraph,