Keywords

#field_flattener_lens

Field flattener lens

Type of lens used in binoculars and astronomic telescopes

Field flattener lens is a type of lens used in modern binocular designs and in astronomic telescopes to improve edge sharpness. Field flattener lenses counteract the Petzval field curvature of an optical system, mitigating the field-angle dependence of the focal length of a system.

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Field flattener lens Binoculars Petzval field curvature Corrective lens Angle of view (photography) Perspective distortion Schmidt–Cassegrain telescope Focal length Aspheric lens Large format lens
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