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Lensfun

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The goal of the Lensfun library is to provide an open source database of photographic lenses and their characteristics. In the past there was an effort in this direction, but then the author decided to take the commercial route and the database froze at the last public stage.

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  • Since 2024

Updated

  • Updated Jan 2026

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  • Self-Hosted
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  •  769 Stars
  •  219 Forks
  •  113 Open Issues
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Lensfun was added to AlternativeTo by Paul on and this page was last updated .

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What is Lensfun?

The goal of the Lensfun library is to provide an open source database of photographic lenses and their characteristics. In the past there was an effort in this direction, but then the author decided to take the commercial route and the database froze at the last public stage. This database was used as the basement on which Lensfun database grew, thanks to PTLens author which gave his permission for this, while the code was totally rewritten from scratch (and the database was converted to a totally new, XML-based format).

The Lensfun library not only provides a way to read the database and search for specific things in it, but also provides a set of algorithms for correcting images based on detailed knowledge of lens properties. Right now, Lensfun is designed to correct distortion, transversal (also known as lateral) chromatic aberrations, and vignetting.

The interface is defined both using C++ style and plain C. The C interface is a wrapper around the C++ classes.