Photographic Lenses: A Simple Treatise |
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Common terms and phrases
achromatic lens anastigmat angle of view astigmatism BECK LENSES Beck-Steinheil Orthostigmat Beck-Steinheil Unofocal Biplanat centre Chromatic aberration circle of illumination colour combination Cornex Cornhill corrected critical definition Curvature of field depth of definition depth of focus diagram diameter distance distortion Double Aplanat edge effect Equality of illumination equivalent focus equivalent plane error exposure figure flare flat focal length focal plane foci focussing Frena full aperture give ground glass hand cameras inches iris diaphragm landscape light low power magnifiers method microscope table mount object obtained optical ordinary perfect Petzval photographic lens picture pinhole placed portion portrait lens portraiture positive lens PRICE produce properties rack and pinion rapid rectilinear rays rectilinear lens refractive result screen sharp sheaths shutter single lens spherical aberration Steinheil Unofocal stop suitable surface telephoto attachment telephoto lens telephotography thin lens wide-angle wide-angle lens Zambex