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File:Lens rayfan.gif ...o<sub>1</sub>''' and '''o<sub>2</sub>''' are the distances from the object positions '''0<sub>1</sub>''' and '''0<sub>2</sub>''' to the principal plane '''P''' ...'i<sub>1</sub>''' and '''i<sub>2</sub>''' are the distances from the image positions '''I<sub>1</sub>''' and '''I<sub>2</sub>''' to the principal plane '''P''''(869 × 401 (9 KB)) - 17:28, 2 August 2021
File:Lens construct.gif ...o<sub>1</sub>''' and '''o<sub>2</sub>''' are the distances from the object positions '''0<sub>1</sub>''' and '''0<sub>2</sub>''' to the principal plane '''P''' ...'i<sub>1</sub>''' and '''i<sub>2</sub>''' are the distances from the image positions '''I<sub>1</sub>''' and '''I<sub>2</sub>''' to the principal plane '''P''''(869 × 401 (7 KB)) - 17:29, 2 August 2021
