Augment port description.

1 files changed, 16 insertions, 2 deletions

diff --git a/graphics/lensfun/pkg-descr b/graphics/lensfun/pkg-descr
index 71980f459fd1..5c4e7fa89b8e 100644
--- a/graphics/lensfun/pkg-descr
+++ b/graphics/lensfun/pkg-descr
@@ -1,4 +1,18 @@
-lensfun is library for rectifying the defects introduced
-by your photographic equipment. 
+The goal of the lensfun library is to provide a open source database of
+photographic lenses and their characteristics.  In the past there was a
+effort in this direction (see http://www.epaperpress.com/ptlens/), but then
+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 and
+calibration data.  Right now lensfun is designed to correct distortion,
+transversal (also known as lateral) chromatic aberrations, vignetting and
+colour contribution of the lens (e.g. when sometimes people says one lens
+gives "yellowish" images and another, say, "bluish").
 
 WWW: http://lensfun.berlios.de/