5 - Symmetrical biconcave lens. 6 - Asymmetrical biconcave lens. 7 - Plano-concave lens. 8 - Negative meniscus lens. ʟ̩Location of the principal planes depending on the geometry of the lens.[1]
{{Information |Description ={{en|1=Various lens shapes, and the location of the principal planes.}} |Source ={{own}} |Author =Tamasflex |Date =2011 |Permission = |other_versions = }} [[Category:Lens dia