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acid action aperture astigmatism axis beam blue bright camera cent solution chemical chloride chromatic aberration circle of confusion coated color combination curve definition density deposit desired diameter diaphragm distance dyes effect equation erythrosin exposure ferrous oxalate Figure film fixing bath focal length focus focusing Fraunhofer line gelatine give given grains grams ground glass hole Hyperfocal Distance hypo illumination inches lantern slide lenses less light metallic silver method necessary negative lens nodal point object obtained optical ordinary paper particles persulphate photographic lens photographic plate picture pin-hole placed platinum process portion positive lens possible potassium Potassium ferricyanide produced rapid plate ratio rays reduced reduction-product reflected refractive requires result salt satisfactory screen sensitiveness sheet shown in Fig shutter silver bromide silver nitrate single lens Sodium soluble spectrum spherical aberration stop substance surface tion usually violet washing yellow
Phys. Rev. 32, 753 (1928): Collins - The Fine Structure of the ...