diff --git a/ccd_defs.json b/ccd_defs.json
index d22ef85a..690e0e70 100644
--- a/ccd_defs.json
+++ b/ccd_defs.json
@@ -300,6 +300,7 @@
   "SONY DSC-W7": 7.176,
   "SONY DSC-W80": 5.75,
   "SONY ILCE-7S": 35.8,
+  "SONY ILCE-5100": 23.5,
   "SONY NEX-5T": 23.4,
   "SONY NEX-5R": 23.4,
   "SONY NEX-7": 23.5,