Editing Circle of confusion (section)

==References==
* {{cite book |last1=Abney |first1=Sir William de Wiveleslie |author-link=Sir William Abney |title=A Treatise on Photography |date=1881 |publisher=Longmans, Green and Co |location=London |url=https://books.google.com/books?id=3QpNAAAAMAAJ&pg=PR3 |language=en}}
* {{cite book |last1=Coddington |first1=Henry |author-link=Henry Coddington |title=A Treatise on the Reflection and Refraction of light: being Part I. of a System of Optics |date=1829 |url=https://books.google.com/books?id=WI45AAAAcAAJ&pg=PA54 |language=en |location=Cambridge |publisher=J. Smith}}
* {{cite book |author-link=John Henry Dallmeyer |last=Dallmeyer |first=John Henry |date=1874 |title=On the Choice and Use of Photographic Lenses |location=New York |publisher=E. and H.T. Anthony and Co}}
* {{cite book |author-link=Thomas Rudolphus Dallmeyer |last=Dallmeyer |first=Thomas R |date=1892 |title=On the Choice and Use of Photographic Lenses |location=London |publisher=J. Pitcher}}
* {{cite book |author=Eastman Kodak Company |date=1972 |title=Optical Formulas and Their Application, Kodak Publication No. AA-26, Rev. 11-72-BX |location=Rochester, New York |publisher=Eastman Kodak Company |ref={{harvid|Kodak|1972}}}}
* {{cite book |last1=Merklinger |first1=Harold M. |title=The INs and OUTs of FOCUS: An Alternative Way to Estimate Depth-of-Field and Sharpness in the Photographic Image |date=1992 |publisher=H.M. Merklinger |location=Bedford, N.S. |isbn=0-9695025-0-8 |url=http://www.trenholm.org/hmmerk/TIAOOFe.pdf}}
* {{cite book |last=Ray |first=Sidney F. |chapter=The geometry of image formation |editor1=Ralph E. Jacobson |editor2=Sidney F. Ray |editor3=Geoffrey G. Atteridge |editor4=Norman R. Axford |title=The Manual of Photography: Photographic and Digital Imaging |edition=9th |date=2000 |publisher=Focal Press |location=Oxford |isbn=0-240-51574-9}}
* {{cite book |last1=Ray |first1=Sidney F. |title=Applied Photographic Optics |date=2002 |edition=3rd |location=Oxford |publisher=Focal |isbn=0-240-51540-4 |url=https://books.google.com/books?id=cuzYl4hx-B8C&pg=PP1 |language=en}}
* {{cite book |author=[[Society for the Diffusion of Useful Knowledge]] |date=1832 |title=Natural Philosophy: With an Explanation of Scientific Terms, and an Index |location=London |publisher=Baldwin and Cradock, Paternoster-Row}}
* {{cite journal |last1=Stokseth |first1=Per A. |title=Properties of a Defocused Optical System |journal=Journal of the Optical Society of America |date=October 1969 |volume=59 |issue=10 |pages=1314 |doi=10.1364/JOSA.59.001314|bibcode=1969JOSA...59.1314S }}
* {{cite journal |author=T.H. [pseud.] |date=1866 |title=Long and Short Focus |journal=British Journal of Photography |issue=13 |ref={{harvid|TH|1866}}}}
* {{cite book |author-link=Moritz von Rohr |last=von Rohr |first=Moritz |date=1899 |title=Photographische Objektiv |location=Berlin |publisher=Verlag Julius Springer}}
* {{cite book |last=Wall |first=Edward John |date=1889 |title=A Dictionary of Photography for the Amateur and Professional Photographer |location=New York |publisher=E. and H. T. Anthony and Co}}