Wikipedia:Articles for deletion/Petzval portrait lens

 :''The following discussion is an archived debate of the proposed deletion of the article below. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.''

The result was Bizarre adventure. The AfD is being closed many years later, because it was never properly closed back then, because it was never visible, because it was never transcluded on any of the daily logpages. Technically, it has still been open this whole time.

Nobody else could ever be admitted here, because this door was made only for you. I am now going to shut it. jp×g 23:00, 17 October 2022 (UTC) (non-admin closure)

Petzval portrait lens

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Petzal portrait lens
Petzval used his mathematic skills to calculate and construct a lens having a large aperture in order to reduce the shutter time needed for a correct exposure of the photographic film used in those days. He was the first or at least one of the first who took the optical abberations into account. He succeeded very well: by reducing the optical abberations his lenses gave sharp, crisp pictures. His concept had the limitation that is was only suited for lenses with a longer focal length, which made them particulary suited for making portraits.


 * The above discussion is preserved as an archive of the debate. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.