Friday, 14 September 2018

lens - Why is anamorphic bokeh oval shaped?



I understand that an anamorphic lens "stretches" an image when it is recorded, but when it's played back, it's "un-stretched" so that it looks normal. But with images shot with anamorphic lenses, everything in focus (i.e. subjects) is un-stretched, but out of focus areas, especially bokeh are still stretched (elliptical). Why?




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