Lens equation calculator (thin lens)
1/f = 1/dᵢ + 1/dₒ
Real-is-positive sign convention used here.
About this tool
Lens equation calculator (thin lens) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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