Petzval field curvature
Petzval field curvature
Optical aberration.
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Readers' pathsAug 2026 – Oct 2026
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Petzval lens
First photographic portrait objective lens.
17%
Circle of confusion
Blurry region in optics.
14%
Joseph Petzval
Slovak physicist, mathematician and inventor.
8.7%
Kepler space telescope
NASA space telescope for exoplanetology (2009–2018).
5.6%
Hyperfocal distance
Distance beyond which all objects can be brought into an acceptable focus.
4.3%
Spherical aberration
Optical aberration.
2.4%
Optical aberration
Deviation from perfect paraxial optical behavior.
2.2%
Readers come from
Share of the 522 readers arriving from another article
Optical aberration
Deviation from perfect paraxial optical behavior.
39%
Kepler space telescope
NASA space telescope for exoplanetology (2009–2018).
14%
Optical telescope
Telescope for observations with visible light.
7.9%
Distortion (optics)
Deviation from rectilinear projection (optics).
2.7%
Petzval lens
First photographic portrait objective lens.
2.5%