diff --git a/camlibs/canon/README b/camlibs/canon/README
index 0fc161739..50e6891b2 100644
--- a/camlibs/canon/README
+++ b/camlibs/canon/README
@@ -105,7 +105,10 @@ Canon cameras use (CRW -Canon RaW files). See
 or
     http://www2.primushost.com/~dcoffin/powershot/
 
-for details on the file format.
+for details on the file format. Currently, only download of CRW files
+is supported without any conversion to common image file formats. Use
+the programs offered on the website mentioned above for conversion from 
+CRW to something else.
 
 
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