>From the Canon FD list:
http://fox.nstn.ca/~hmmerk/HMbook14.html
this is the site of harold merklinger with a lot of PDF files about focussing
at
infinity etc. and Bokeh ["A Technical View of Bokeh"]. These are articles that
were published in a magazine and they are very explanatory with interesting
graphics and graphs that illustrate the difference between some lenses he
describes. Especially interesting is the part about the interaction between
the aperture shape and object shape.
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